MTConnectStreams_1.5_1.0.xsd

<?xml version='1.0' encoding='UTF-8'?>
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<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns='urn:mtconnect.org:MTConnectStreams:1.5' xmlns:mt='urn:mtconnect.org:MTConnectStreams:1.5' targetNamespace='urn:mtconnect.org:MTConnectStreams:1.5' elementFormDefault='qualified' attributeFormDefault='unqualified'>
  <xs:element name='MTConnectStreams' type='MTConnectStreamsType'>
    <xs:annotation>
      <xs:documentation>
        It is the root XML element of an mtconnectstreams response document.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='SenderType'>
    <xs:annotation>
      <xs:documentation>
        The sender of the message
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='CreationTimeType'>
    <xs:annotation>
      <xs:documentation>
        The date and time the document was created
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:dateTime'/>
  </xs:simpleType>
  <xs:simpleType name='SequenceType'>
    <xs:annotation>
      <xs:documentation>
        A sequence number
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='1'/>
      <xs:maxExclusive value='18446744073709551615'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='TestIndicatorType'>
    <xs:annotation>
      <xs:documentation>
        A debugging flag for testing.
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:boolean'/>
  </xs:simpleType>
  <xs:simpleType name='InstanceIdType'>
    <xs:annotation>
      <xs:documentation>
        The instance number of the agent, used for fault tolerance
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='1'/>
      <xs:maxExclusive value='18446744073709551615'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='BufferSizeType'>
    <xs:annotation>
      <xs:documentation>
        The size of the agents buffer
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='1'/>
      <xs:maxExclusive value='4294967295'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='TimestampType'>
    <xs:annotation>
      <xs:documentation>
        The time the sample was reported
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:dateTime'/>
  </xs:simpleType>
  <xs:simpleType name='OccurrenceTimeType'>
    <xs:annotation>
      <xs:documentation>
        The time a sample occurred
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:dateTime'/>
  </xs:simpleType>
  <xs:simpleType name='VersionType'>
    <xs:annotation>
      <xs:documentation>
        A version number
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:NMTOKEN'/>
  </xs:simpleType>
  <xs:simpleType name='NameType'>
    <xs:annotation>
      <xs:documentation>
        A short name for any element
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='UuidType'>
    <xs:annotation>
      <xs:documentation>
        A universally unique id that uniquely identifies the element for
        it&apos;s entire life
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='SerialNumberAttrType'>
    <xs:annotation>
      <xs:documentation>
        A serial number for a piece of equipment
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='ItemSourceType'>
    <xs:annotation>
      <xs:documentation>
        The measurement source
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='RateType'>
    <xs:annotation>
      <xs:documentation>
        A sample rate in milliseconds per sample
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:float'/>
  </xs:simpleType>
  <xs:simpleType name='ComponentIdType'>
    <xs:annotation>
      <xs:documentation>
        The id of the component (maps to the id from probe)
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:ID'/>
  </xs:simpleType>
  <xs:simpleType name='IDType'>
    <xs:annotation>
      <xs:documentation>
        An identifier
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:ID'/>
  </xs:simpleType>
  <xs:simpleType name='SignificantDigitsValueType'>
    <xs:annotation>
      <xs:documentation>
        The number significant digits
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'/>
  </xs:simpleType>
  <xs:simpleType name='CompositionIdType'>
    <xs:annotation>
      <xs:documentation>
        The item&apos;s reference to the Device model composition
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:NMTOKEN'/>
  </xs:simpleType>
  <xs:simpleType name='DurationTimeType'>
    <xs:annotation>
      <xs:documentation>
        A length of time in seconds
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:float'/>
  </xs:simpleType>
  <xs:simpleType name='RemovedType'>
    <xs:annotation>
      <xs:documentation>
        A flag indicating the item has been removed
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:boolean'/>
  </xs:simpleType>
  <xs:simpleType name='AssetIdType'>
    <xs:annotation>
      <xs:documentation>
        The unique id of the asset
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='AssetAttrTypeType'>
    <xs:annotation>
      <xs:documentation>
        An asset type
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='AssetBufferSizeType'>
    <xs:annotation>
      <xs:documentation>
        The maximum number of assets
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='1'/>
      <xs:maxExclusive value='4294967295'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='AssetCountAttrType'>
    <xs:annotation>
      <xs:documentation>
        The number of assets
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'>
      <xs:minInclusive value='0'/>
      <xs:maxExclusive value='4294967295'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='FloatListValueType'>
    <xs:annotation>
      <xs:documentation>
        Common floating point sample value
      </xs:documentation>
    </xs:annotation>
    <xs:list>
      <xs:simpleType>
        <xs:restriction base='xs:float'/>
      </xs:simpleType>
    </xs:list>
  </xs:simpleType>
  <xs:simpleType name='ThreeSpaceValueType'>
    <xs:annotation>
      <xs:documentation>
        A three dimensional value &apos;X Y Z&apos; or &apos;A B C&apos;
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='FloatListValueType'>
      <xs:maxLength value='3'/>
      <xs:minLength value='3'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DescriptionTextType'>
    <xs:annotation>
      <xs:documentation>
        A description
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='DataItemExtType'>
    <xs:annotation>
      <xs:documentation>
        An extension point for data item types
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:pattern value='[a-ln-z]:[A-Z_0-9]+'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemStatsExtType'>
    <xs:annotation>
      <xs:documentation>
        An extension point for data item statistics types
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:pattern value='[a-ln-z]:[A-Z_0-9]+'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemEnumTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The types of measurements available
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTUATOR'>
        <xs:annotation>
          <xs:documentation>
            A mechanism for moving or controlling a mechanical part of a piece
            of equipment. It takes energy usually provided by air, electric
            current, or liquid and converts the energy into some kind of motion.
            
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ACCELERATION'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the rate of change of velocity.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ACCUMULATED_TIME'>
        <xs:annotation>
          <xs:documentation>
            The measurement of accumulated time for an activity or event.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AMPERAGE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of electrical current.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ANGLE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of angular position.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ANGULAR_ACCELERATION'>
        <xs:annotation>
          <xs:documentation>
            The measurement rate of change of angular velocity.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ANGULAR_VELOCITY'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the rate of change of angular position.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AXIS_FEEDRATE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the feedrate of a linear axis.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CLOCK_TIME'>
        <xs:annotation>
          <xs:documentation>
            The value provided by a timing device at a specific point in time.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CONCENTRATION'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the percentage of one component within a mixture
            of components
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CONDUCTIVITY'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the ability of a material to conduct electricity.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DISPLACEMENT'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the change in position of an object.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ELECTRICAL_ENERGY'>
        <xs:annotation>
          <xs:documentation>
            The measurement of electrical energy consumption by a component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='EQUIPMENT_TIMER'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the amount of time a piece of equipment or a
            sub-part of a piece of equipment has performed specific activities.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FILL_LEVEL'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the amount of a substance remaining compared to
            the planned maximum amount of that substance.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FLOW'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the rate of flow of a fluid.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FREQUENCY'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the number of occurrences of a repeating event
            per unit time.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='GLOBAL_POSITION'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED in Version 1.1
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LENGTH'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the length of an object.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LEVEL'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED in Version 1.2. See filllevel sample
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LINEAR_FORCE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the push or pull introduced by an actuator or
            exerted on an object.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LOAD'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the actual versus the standard rating of a piece
            of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MASS'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the mass of an object(s) or an amount of
            material.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PATH_FEEDRATE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the feedrate for the axes, or a single axis,
            associated with a path component-a vector.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PATH_POSITION'>
        <xs:annotation>
          <xs:documentation>
            A measured or calculated position of a control point associated with
            a controller element, or path element if provided, of a piece of
            equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PH'>
        <xs:annotation>
          <xs:documentation>
            A measure of the acidity or alkalinity of a solution.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='POSITION'>
        <xs:annotation>
          <xs:documentation>
            A measured or calculated position of a component element as reported
            by a piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='POWER_FACTOR'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the ratio of real power flowing to a load to the
            apparent power in that AC circuit.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PRESSURE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of force per unit area exerted by a gas or liquid.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROCESS_TIMER'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the amount of time a piece of equipment has
            performed different types of activities associated with the process
            being performed at that piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='RESISTANCE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the degree to which a substance opposes the
            passage of an electric current.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ROTARY_VELOCITY'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the rotational speed of a rotary axis.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SOUND_LEVEL'>
        <xs:annotation>
          <xs:documentation>
            The measurement of a sound level or sound pressure level relative to
            atmospheric pressure.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SPINDLE_SPEED'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED in Version 1.2. Replaced by rotaryvelocity sample
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='STRAIN'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the amount of deformation per unit length of an
            object when a load is applied.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TEMPERATURE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of temperature.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TENSION'>
        <xs:annotation>
          <xs:documentation>
            The measurement of a force that stretches or elongates an object.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TILT'>
        <xs:annotation>
          <xs:documentation>
            The measurement of angular displacement. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TORQUE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the turning force exerted on an object or by an
            object.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VELOCITY'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the rate of change of position of a component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VISCOSITY'>
        <xs:annotation>
          <xs:documentation>
            The measurement of a fluids resistance to flow.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLT_AMPERE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the apparent power in an electrical circuit,
            equal to the product of root-mean-square (RMS) voltage and RMS
            current (commonly referred to as VA).
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLT_AMPERE_REACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of reactive power in an AC electrical circuit
            (commonly referred to as VAR).
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLTAGE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of electrical potential between two points.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WATTAGE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of power flowing through or dissipated by an
            electrical circuit or piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ACTIVE_AXES'>
        <xs:annotation>
          <xs:documentation>
            The set of axes currently associated with a path or controller
            structural element.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ACTUATOR_STATE'>
        <xs:annotation>
          <xs:documentation>
            Represents the operational state of an apparatus for moving or
            controlling a mechanism or system.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ALARM'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED: Replaced with condition category category data items in
            Version 1.1.0.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AVAILABILITY'>
        <xs:annotation>
          <xs:documentation>
            Represents the agent&apos;s ability to communicate with the data
            source.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AXIS_COUPLING'>
        <xs:annotation>
          <xs:documentation>
            Describes the way the axes will be associated to each other. This is
            used in conjunction with coupledaxes event to indicate the way they
            are interacting.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AXIS_FEEDRATE_OVERRIDE'>
        <xs:annotation>
          <xs:documentation>
            The value of a signal or calculation issued to adjust the feedrate
            of an individual linear type axis.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AXIS_INTERLOCK'>
        <xs:annotation>
          <xs:documentation>
            An indicator of the state of the axis lockout function when power
            has been removed and the axis is allowed to move freely.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AXIS_STATE'>
        <xs:annotation>
          <xs:documentation>
            An indicator of the controlled state of a linear or rotary component
            representing an axis.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='BLOCK'>
        <xs:annotation>
          <xs:documentation>
            The line of code or command being executed by a controller
            structural element.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='BLOCK_COUNT'>
        <xs:annotation>
          <xs:documentation>
            The total count of the number of blocks of program code that have
            been executed since execution started.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CHUCK_INTERLOCK'>
        <xs:annotation>
          <xs:documentation>
            An indication of the state of an interlock function or control logic
            state intended to prevent the associated chuck component from being
            operated.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CHUCK_STATE'>
        <xs:annotation>
          <xs:documentation>
            An indication of the operating state of a mechanism that holds a
            part or stock material during a manufacturing process. It may also
            represent a mechanism that holds any other mechanism in place within
            a piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CODE'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED in Version 1.1.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='COMPOSITION_STATE'>
        <xs:annotation>
          <xs:documentation>
            An indication of the operating condition of a mechanism represented
            by a composition type element.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CONTROLLER_MODE'>
        <xs:annotation>
          <xs:documentation>
            The current operating mode of the controller component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CONTROLLER_MODE_OVERRIDE'>
        <xs:annotation>
          <xs:documentation>
            A setting or operator selection that changes the behavior of a piece
            of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='COUPLED_AXES'>
        <xs:annotation>
          <xs:documentation>
            Refers to the set of associated axes.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DIRECTION'>
        <xs:annotation>
          <xs:documentation>
            The direction of motion.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DOOR_STATE'>
        <xs:annotation>
          <xs:documentation>
            The operational state of a door type component or composition
            element.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='EMERGENCY_STOP'>
        <xs:annotation>
          <xs:documentation>
            The current state of the emergency stop signal for a piece of
            equipment, controller path, or any other component or subsystem of a
            piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='END_OF_BAR'>
        <xs:annotation>
          <xs:documentation>
            An indication of whether the end of a piece of bar stock being feed
            by a bar feeder has been reached.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='EQUIPMENT_MODE'>
        <xs:annotation>
          <xs:documentation>
            An indication that a piece of equipment, or a sub-part of a piece of
            equipment, is performing specific types of activities.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='EXECUTION'>
        <xs:annotation>
          <xs:documentation>
            The execution status of the controller.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FUNCTIONAL_MODE'>
        <xs:annotation>
          <xs:documentation>
            The current intended production status of the device or component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='HARDNESS'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the hardness of a material.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INTERFACE_STATE'>
        <xs:annotation>
          <xs:documentation>
            An indication of the operational state of an interface component
            component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LINE'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED in Version 1.4.0.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LINE_LABEL'>
        <xs:annotation>
          <xs:documentation>
            An optional identifier for a block event of code in a program event.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LINE_NUMBER'>
        <xs:annotation>
          <xs:documentation>
            A reference to the position of a block of program code within a
            control program.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MATERIAL'>
        <xs:annotation>
          <xs:documentation>
            The identifier of a material used or consumed in the manufacturing
            process.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MESSAGE'>
        <xs:annotation>
          <xs:documentation>
            Any text string of information to be transferred from a piece of
            equipment to a client software application.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OPERATOR_ID'>
        <xs:annotation>
          <xs:documentation>
            The identifier of the person currently responsible for operating the
            piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PALLET_ID'>
        <xs:annotation>
          <xs:documentation>
            The identifier for a pallet.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PART_COUNT'>
        <xs:annotation>
          <xs:documentation>
            The count of parts produced.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PART_ID'>
        <xs:annotation>
          <xs:documentation>
            An identifier of a part in a manufacturing operation.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PART_NUMBER'>
        <xs:annotation>
          <xs:documentation>
            An identifier of a part or product moving through the manufacturing
            process. The valid data value must be a text string. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PATH_FEEDRATE_OVERRIDE'>
        <xs:annotation>
          <xs:documentation>
            The value of a signal or calculation issued to adjust the feedrate
            for the axes associated with a path component that may represent a
            single axis or the coordinated movement of multiple axes.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PATH_MODE'>
        <xs:annotation>
          <xs:documentation>
            Describes the operational relationship between a path structural
            element and another path structural element for pieces of equipment
            comprised of multiple logical groupings of controlled axes or other
            logical operations.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='POWER_STATE'>
        <xs:annotation>
          <xs:documentation>
            The indication of the status of the source of energy for a
            structural element to allow it to perform its intended function or
            the state of an enabling signal providing permission for the
            structural element to perform its functions.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='POWER_STATUS'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED in Version 1.1.0.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM'>
        <xs:annotation>
          <xs:documentation>
            The name of the logic or motion program being executed by the
            controller component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_COMMENT'>
        <xs:annotation>
          <xs:documentation>
            A comment or non-executable statement in the control program. The
            valid data value must be a text string.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_EDIT'>
        <xs:annotation>
          <xs:documentation>
            An indication of the status of the controller components program
            editing mode. On many controls, a program can be edited while
            another program is currently being executed.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_EDIT_NAME'>
        <xs:annotation>
          <xs:documentation>
            The name of the program being edited. This is used in conjunction
            with programedit event when in active value state. The valid data
            value must be a text string.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_HEADER'>
        <xs:annotation>
          <xs:documentation>
            The non-executable header section of the control program.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ROTARY_MODE'>
        <xs:annotation>
          <xs:documentation>
            The current operating mode for a rotary type axis.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ROTARY_VELOCITY_OVERRIDE'>
        <xs:annotation>
          <xs:documentation>
            The value of a command issued to adjust the programmed velocity for
            a rotary type axis. This command represents a percentage change to
            the velocity calculated by a logic or motion program or set by a
            switch for a rotary type axis.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SERIAL_NUMBER'>
        <xs:annotation>
          <xs:documentation>
            The serial number associated with a component, asset
            mtconnectassets, or device. The valid data value must be a text
            string.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SPINDLE_INTERLOCK'>
        <xs:annotation>
          <xs:documentation>
            An indication of the status of the spindle for a piece of equipment
            when power has been removed and it is free to rotate.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TOOL_ASSET_ID'>
        <xs:annotation>
          <xs:documentation>
            The identifier of an individual tool asset.The valid data value must
            be a text string.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TOOL_ID'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED in Version 1.2.0. See toolassetid event. The identifier
            of the tool currently in use for a given path.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TOOL_NUMBER'>
        <xs:annotation>
          <xs:documentation>
            The identifier assigned by the controller component to a cutting
            tool when in use by a piece of equipment. The valid data value must
            be a text string.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TOOL_OFFSET'>
        <xs:annotation>
          <xs:documentation>
            A reference to the tool offset variables applied to the active
            cutting tool associated with a path in a controller type component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='USER'>
        <xs:annotation>
          <xs:documentation>
            The identifier of the person currently responsible for operating the
            piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WIRE'>
        <xs:annotation>
          <xs:documentation>
            A string like piece or filament of relatively rigid or flexible
            material provided in a variety of diameters.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WORK_OFFSET'>
        <xs:annotation>
          <xs:documentation>
            A reference to the offset variables for a work piece or part
            associated with a path in a controller type component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WORKHOLDING_ID'>
        <xs:annotation>
          <xs:documentation>
            The identifier for the current workholding or part clamp in use by a
            piece of equipment. The valid data value must be a text string.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='COMMUNICATIONS'>
        <xs:annotation>
          <xs:documentation>
            An indication that the piece of equipment has experienced a
            communications failure.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DATA_RANGE'>
        <xs:annotation>
          <xs:documentation>
            An indication that the value of the data associated with a measured
            value or a calculation is outside of an expected range.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='HARDWARE'>
        <xs:annotation>
          <xs:documentation>
            An indication of a fault associated with the hardware subsystem of
            the structural element.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LOGIC_PROGRAM'>
        <xs:annotation>
          <xs:documentation>
            An indication that an error occurred in the logic program or
            programmable logic controller (PLC) associated with a piece of
            equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MOTION_PROGRAM'>
        <xs:annotation>
          <xs:documentation>
            An indication that an error occurred in the motion program
            associated with a piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SYSTEM'>
        <xs:annotation>
          <xs:documentation>
            A general purpose indication associated with an electronic component
            of a piece of equipment or a controller that represents a fault that
            is not associated with the operator, program, or hardware.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ASSET_CHANGED'>
        <xs:annotation>
          <xs:documentation>
            The value of the cdata for the event MUST be the assetid of the
            asset that has been added or changed. There will not be a separate
            message for new assets.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ASSET_REMOVED'>
        <xs:annotation>
          <xs:documentation>
            The value of the cdata for the event MUST be the assetid of the
            asset that has been removed. The asset will still be visible if
            requested with the includeremoved parameter as described in the
            protocol section. When assets are removed they are not moved to the
            beginning of the most recently modified list. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OPEN_DOOR'>
        <xs:annotation>
          <xs:documentation>
            Service to open a door. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CLOSE_DOOR'>
        <xs:annotation>
          <xs:documentation>
            Service to close a door.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OPEN_CHUCK'>
        <xs:annotation>
          <xs:documentation>
            Service to open a chuck. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CLOSE_CHUCK'>
        <xs:annotation>
          <xs:documentation>
            Service to close a chuck.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MATERIAL_FEED'>
        <xs:annotation>
          <xs:documentation>
            Service to advance material or feed product to a piece of equipment
            from a continuous or bulk source. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MATERIAL_CHANGE'>
        <xs:annotation>
          <xs:documentation>
            Service to change the type of material or product being loaded or
            fed to a piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MATERIAL_RETRACT'>
        <xs:annotation>
          <xs:documentation>
            Service to remove or retract material or product.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PART_CHANGE'>
        <xs:annotation>
          <xs:documentation>
            Service to change the part or product associated with a piece of
            equipment to a different part or product. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MATERIAL_LOAD'>
        <xs:annotation>
          <xs:documentation>
            Service to load a piece of material or product.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MATERIAL_UNLOAD'>
        <xs:annotation>
          <xs:documentation>
            Service to unload a piece of material or product.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLUME_SPATIAL'>
        <xs:annotation>
          <xs:documentation>
            The geometric volume of an object or container.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLUME_FLUID'>
        <xs:annotation>
          <xs:documentation>
            The fluid volume of an object or container.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CAPACITY_SPATIAL'>
        <xs:annotation>
          <xs:documentation>
            The geometric capacity of an object or container.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CAPACITY_FLUID'>
        <xs:annotation>
          <xs:documentation>
            The fluid capacity of an object or container.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DENSITY'>
        <xs:annotation>
          <xs:documentation>
            The volumetric mass of a material per unit volume of that material.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEPOSITION_VOLUME'>
        <xs:annotation>
          <xs:documentation>
            The spatial volume of material to be deposited in an additive
            manufacturing process.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEPOSITION_RATE_VOLUMETRIC'>
        <xs:annotation>
          <xs:documentation>
            The rate at which a spatial volume of material is deposited in an
            additive manufacturing process.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEPOSITION_ACCELERATION_VOLUMETRIC'>
        <xs:annotation>
          <xs:documentation>
            The rate of change in spatial volume of material deposited in an
            additive manufacturing process.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEPOSITION_MASS'>
        <xs:annotation>
          <xs:documentation>
            The mass of the material deposited in an additive manufacturing
            process.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEPOSITION_DENSITY'>
        <xs:annotation>
          <xs:documentation>
            The density of the material deposited in an additive manufacturing
            process per unit of volume.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROCESS_TIME'>
        <xs:annotation>
          <xs:documentation>
            The time and date associated with an activity or event. processtime
            event MUST be reported in ISO 8601 format.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DATE_CODE'>
        <xs:annotation>
          <xs:documentation>
            The time and date code associated with a material or other physical
            item. datecode event MUST be reported in ISO 8601 format.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MATERIAL_LAYER'>
        <xs:annotation>
          <xs:documentation>
            Identifies the layers of material applied to a part or product as
            part of an additive manufacturing process. The valid data value MUST
            be an integer.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WAIT_STATE'>
        <xs:annotation>
          <xs:documentation>
            An indication of the reason that execution event is reporting a
            value of wait. The valid data value MUST be poweringup,
            poweringdown, partload, partunload, toolload, toolunload,
            materialload event, materialunload event, secondaryprocess, pausing,
            or resuming.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PART_DETECT'>
        <xs:annotation>
          <xs:documentation>
            An indication designating whether a part or work piece has been
            detected or is present. The valid data value MUST be present or
            notpresent.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEVICE_UUID'>
        <xs:annotation>
          <xs:documentation>
            The identifier of another piece of equipment that is temporarily
            associated with a component of this piece of equipment to perform a
            particular function. The valid data value MUST be a NMTOKEN XML
            type.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CUTTING_SPEED'>
        <xs:annotation>
          <xs:documentation>
             The speed difference (relative velocity) between the cutting
            mechanism and the surface of the workpiece it is operating on.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PATH_FEEDRATE_PER_REVOLUTION'>
        <xs:annotation>
          <xs:documentation>
            The feedrate for the axes, or a single axis.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_NEST_LEVEL'>
        <xs:annotation>
          <xs:documentation>
            An indication of the nesting level within a control program that is
            associated with the code or instructions that is currently being
            executed. If an Initial Value is not defined, the nesting level
            associated with the highest or initial nesting level of the program
            MUST default to zero (0). The value reported for programnestlevel
            event MUST be an integer.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_LOCATION_TYPE'>
        <xs:annotation>
          <xs:documentation>
            Defines whether the logic or motion program defined by program event
            is being executed from the local memory of the controller or from an
            outside source. The valid data value MUST be local or external.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_LOCATION'>
        <xs:annotation>
          <xs:documentation>
            The Uniform Resource Identifier (URI) for the source file associated
            with program event.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TOOL_GROUP'>
        <xs:annotation>
          <xs:documentation>
            An identifier for the tool group associated with a specific tool.
            Commonly used to designate spare tools.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VARIABLE'>
        <xs:annotation>
          <xs:documentation>
             A data value whose meaning may change over time due to changes in
            the opertion of a piece of equipment or the process being executed
            on that piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VARIABLE'>
        <xs:annotation>
          <xs:documentation>
            A user variable
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemEnumType'>
    <xs:annotation>
      <xs:documentation>
        The types of measurements available
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='DataItemEnumTypeEnum DataItemExtType'/>
  </xs:simpleType>
  <xs:simpleType name='DataItemSubEnumTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The sub-types for a measurement
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTUAL'>
        <xs:annotation>
          <xs:documentation>
            The measured value of the data item type given by a sensor or
            encoder.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MAXIMUM'>
        <xs:annotation>
          <xs:documentation>
            Maximum value of a data entity or attribute.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MINIMUM'>
        <xs:annotation>
          <xs:documentation>
            The minimum value of a data entity or attribute.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DIRECT'>
        <xs:annotation>
          <xs:documentation>
            The measurement of DC current or voltage.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TARGET'>
        <xs:annotation>
          <xs:documentation>
            The desired measure or count for a data item value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='COMMANDED'>
        <xs:annotation>
          <xs:documentation>
            A value specified by the controller type component.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OVERRIDE'>
        <xs:annotation>
          <xs:documentation>
            DEPRECATED: The operators overridden value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAMMED'>
        <xs:annotation>
          <xs:documentation>
            The value of a signal or calculation specified by a logic or motion
            program or set by a switch.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='RAPID'>
        <xs:annotation>
          <xs:documentation>
            The value of a signal or calculation issued to adjust the feedrate
            of a component or composition that is operating in a rapid
            positioning mode.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WORKING'>
        <xs:annotation>
          <xs:documentation>
            A piece of equipment performing any activity, the equipment is
            active and performing a function under load or not.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='STANDARD'>
        <xs:annotation>
          <xs:documentation>
            The standard or original length of an object.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='USEABLE'>
        <xs:annotation>
          <xs:documentation>
            The remaining useable length of an object.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROBE'>
        <xs:annotation>
          <xs:documentation>
            The position provided by a measurement probe.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROCESS'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the time from the beginning of production of a
            part or product on a piece of equipment until the time that
            production is complete for that part or product on that piece of
            equipment. This includes the time that the piece of equipment is
            running, producing parts or products, or in the process of producing
            parts.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='A_SCALE'>
        <xs:annotation>
          <xs:documentation>
            A Scale weighting factor. This is the default weighting factor if no
            factor is specified
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='B_SCALE'>
        <xs:annotation>
          <xs:documentation>
            B Scale weighting factor
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='C_SCALE'>
        <xs:annotation>
          <xs:documentation>
            C Scale weighting factor
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='D_SCALE'>
        <xs:annotation>
          <xs:documentation>
            D Scale weighting factor
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='NO_SCALE'>
        <xs:annotation>
          <xs:documentation>
            No weighting factor on the frequency scale
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ALTERNATING'>
        <xs:annotation>
          <xs:documentation>
            The measurement of alternating voltage or current. If not specified
            further in statistic, defaults to RMS voltage. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MANUAL_UNCLAMP'>
        <xs:annotation>
          <xs:documentation>
            An indication of the state of an operator controlled interlock that
            can inhibit the ability to initiate an unclamp action of an
            electronically controlled chuck. The valid data value must be active
            value or inactive value. When manualunclamp subtype is active value,
            it is expected that a chuck cannot be unclamped until manualunclamp
            subtype is set to inactive value. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ACTION'>
        <xs:annotation>
          <xs:documentation>
            An indication of the operating state of a mechanism represented by a
            composition type component. The operating state indicates whether
            the composition element is activated or disabled. The valid data
            value must be active value or inactive value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LATERAL'>
        <xs:annotation>
          <xs:documentation>
            An indication of the position of a mechanism that may move in a
            lateral direction. The mechanism is represented by a composition
            type component. The position information indicates whether the
            composition element is positioned to the right, to the left, or is
            in transition. The valid data value must be right value, left value,
            or transitioning value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MOTION'>
        <xs:annotation>
          <xs:documentation>
            An indication of the open or closed state of a mechanism. The
            mechanism is represented by a composition type component. The
            operating state indicates whether the state of the composition
            element is open, closed, or unlatched. The valid data value must be
            open value, unlatched value, or closed value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SWITCHED'>
        <xs:annotation>
          <xs:documentation>
            An indication of the activation state of a mechanism represented by
            a composition type component. The activation state indicates whether
            the composition element is activated or not. The valid data value
            must be on value or off value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VERTICAL'>
        <xs:annotation>
          <xs:documentation>
            An indication of the position of a mechanism that may move in a
            vertical direction. The mechanism is represented by a composition
            type component. The position information indicates whether the
            composition element is positioned to the top, to the bottom, or is
            in transition. The valid data value must be up value, down value, or
            transitioning value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DRY_RUN'>
        <xs:annotation>
          <xs:documentation>
            A setting or operator selection used to execute a test mode to
            confirm the execution of machine functions. The valid data value
            must be on value or off value. When dryrun subtype is on value, the
            equipment performs all of its normal functions, except no part or
            product is produced. If the equipment has a spindle, spindle
            operation is suspended.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MACHINE_AXIS_LOCK'>
        <xs:annotation>
          <xs:documentation>
            A setting or operator selection that changes the behavior of the
            controller on a piece of equipment. The valid data value must be on
            value or off value. When machineaxislock subtype is on value,
            program execution continues normally, but no equipment motion occurs
            
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OPTIONAL_STOP'>
        <xs:annotation>
          <xs:documentation>
            A setting or operator selection that changes the behavior of the
            controller on a piece of equipment. The valid data value must be on
            value or off value. The program execution is stopped after a
            specific program block is executed when optionalstop subtype is on
            value. In the case of a G-Code program, a program block event
            containing a M01 code designates the command for an optionalstop
            subtype. execution event must change to optionalstop subtype after a
            program block specifying an optional stop is executed and the
            optionalstop subtype selection is on value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SINGLE_BLOCK'>
        <xs:annotation>
          <xs:documentation>
            A setting or operator selection that changes the behavior of the
            controller on a piece of equipment. The valid data value must be on
            value or off value. Program execution is paused after each block
            event of code is executed when singleblock subtype is on value. When
            singleblock subtype is on value, execution event must change to
            interrupted value after completion of each block event of code. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TOOL_CHANGE_STOP'>
        <xs:annotation>
          <xs:documentation>
            A setting or operator selection that changes the behavior of the
            controller on a piece of equipment. The valid data value must be on
            value or off value. Program execution is paused when a command is
            executed requesting a cutting tool to be changed. execution event
            must change to interrupted value after completion of the command
            requesting a cutting tool to be changed and toolchangestop subtype
            is on value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LINEAR'>
        <xs:annotation>
          <xs:documentation>
            The direction of motion of a linear motion.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ROTARY'>
        <xs:annotation>
          <xs:documentation>
            The rotational direction of a rotary motion using the right hand
            rule convention. The valid data value must be clockwise value or
            counterclockwise value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AUXILIARY'>
        <xs:annotation>
          <xs:documentation>
            When multiple locations on a piece of bar stock are referenced as
            the indication for the endofbar event, the additional location(s)
            must be designated as auxiliary subtype indication(s) for the
            endofbar event. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PRIMARY'>
        <xs:annotation>
          <xs:documentation>
            Specific applications MAY reference one or more locations on a piece
            of bar stock as the indication for the endofbar event. The main or
            most important location must be designated as the primary subtype
            indication for the endofbar event. If no subtype is specified,
            primary subtype must be the default endofbar event indication.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DELAY'>
        <xs:annotation>
          <xs:documentation>
            A piece of equipment waiting for an event or an action to occur.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LOADED'>
        <xs:annotation>
          <xs:documentation>
            Subparts of a piece of equipment are under load.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OPERATING'>
        <xs:annotation>
          <xs:documentation>
            A piece of equipment are powered or performing any activity.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='POWERED'>
        <xs:annotation>
          <xs:documentation>
            Primary power is applied to the piece of equipment and, as a
            minimum, the controller or logic portion of the piece of equipment
            is powered and functioning or components that are required to remain
            on are powered.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='BRINELL'>
        <xs:annotation>
          <xs:documentation>
            A scale to measure the resistance to deformation of a surface.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LEEB'>
        <xs:annotation>
          <xs:documentation>
            A scale to measure the elasticity of a surface.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MOHS'>
        <xs:annotation>
          <xs:documentation>
            A scale to measure the resistance to scratching of a surface.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ROCKWELL'>
        <xs:annotation>
          <xs:documentation>
            A scale to measure the resistance to deformation of a surface.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SHORE'>
        <xs:annotation>
          <xs:documentation>
            A scale to measure the resistance to deformation of a surface.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VICKERS'>
        <xs:annotation>
          <xs:documentation>
            A scale to measure the resistance to deformation of a surface.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ABSOLUTE'>
        <xs:annotation>
          <xs:documentation>
            The position of a block of program code relative to the beginning of
            the control program.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INCREMENTAL'>
        <xs:annotation>
          <xs:documentation>
            The position of a block of program code relative to the occurrence
            of the last linelabel event encountered in the control program.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ALL'>
        <xs:annotation>
          <xs:documentation>
            The count of all the parts produced. If the subtype is not given,
            this is the default.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='BAD'>
        <xs:annotation>
          <xs:documentation>
            Indicates the count of incorrect parts produced.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='GOOD'>
        <xs:annotation>
          <xs:documentation>
            Indicates the count of correct parts made.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='REMAINING'>
        <xs:annotation>
          <xs:documentation>
            Remaining measure of an object or an action.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='JOG'>
        <xs:annotation>
          <xs:documentation>
            The feedrate specified by a logic or motion program, by a pre-set
            value, or set by a switch as the feedrate for the axes. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CONTROL'>
        <xs:annotation>
          <xs:documentation>
            The state of the enabling signal or control logic that enables or
            disables the function or operation of the structural element.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LINE'>
        <xs:annotation>
          <xs:documentation>
            The state of the power source for the structural element.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='RADIAL'>
        <xs:annotation>
          <xs:documentation>
            A reference to a radial type tool offset variable.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LENGTH'>
        <xs:annotation>
          <xs:documentation>
            A reference to a length type tool offset variable.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MAINTENANCE'>
        <xs:annotation>
          <xs:documentation>
            Action related to maintenance on the piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OPERATOR'>
        <xs:annotation>
          <xs:documentation>
            The identifier of the person currently responsible for operating the
            piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SET_UP'>
        <xs:annotation>
          <xs:documentation>
            The identifier of the person currently responsible for preparing a
            piece of equipment for production or restoring the piece of
            equipment to a neutral state after production.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='COMPLETE'>
        <xs:annotation>
          <xs:documentation>
            Completion of an action.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CONSUMED'>
        <xs:annotation>
          <xs:documentation>
            The amount of bulk material consumed from an object or container
            during a manufacturing process.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='START'>
        <xs:annotation>
          <xs:documentation>
            The time and date associated with the beginning of an activity or
            event.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TARGET_COMPLETION'>
        <xs:annotation>
          <xs:documentation>
            The projected time and date associated with the end or completion of
            an activity or event.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MANUFACTURE'>
        <xs:annotation>
          <xs:documentation>
            The time and date code relating to the production of a material or
            other physical item.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='EXPIRATION'>
        <xs:annotation>
          <xs:documentation>
            The time and date code relating to the expiration or end of useful
            life for a material or other physical item.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FIRST_USE'>
        <xs:annotation>
          <xs:documentation>
            The time and date code relating the first use of a material or other
            physical item.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SCHEDULE'>
        <xs:annotation>
          <xs:documentation>
            The identity of a control program that is used to specify the order
            of execution of other programs.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MAIN'>
        <xs:annotation>
          <xs:documentation>
            The identity of the primary logic or motion program currently being
            executed. It is the starting nest level in a call structure and may
            contain calls to sub programs.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemSubEnumType'>
    <xs:annotation>
      <xs:documentation>
        The sub-types for a measurement
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='DataItemSubEnumTypeEnum DataItemExtType'/>
  </xs:simpleType>
  <xs:simpleType name='DataItemStatisticsTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        Statistical operations on data
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='AVERAGE'>
        <xs:annotation>
          <xs:documentation>
            Mathematical Average value calculated for the data item during the
            calculation period.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='KURTOSIS'>
        <xs:annotation>
          <xs:documentation>
            A measure of the &quot;peakedness&quot; of a probability
            distribution; i.e., the shape of the distribution curve.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MAXIMUM'>
        <xs:annotation>
          <xs:documentation>
            Maximum value of a data entity or attribute.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MEDIAN'>
        <xs:annotation>
          <xs:documentation>
            The middle number of a series of numbers.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MINIMUM'>
        <xs:annotation>
          <xs:documentation>
            The minimum value of a data entity or attribute.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MODE'>
        <xs:annotation>
          <xs:documentation>
            The number in a series of numbers that occurs most often.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='RANGE'>
        <xs:annotation>
          <xs:documentation>
            Difference between the maximum and minimum value of a data item
            during the calculation period. Also represents Peak-to-Peak
            measurement in a waveform.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ROOT_MEAN_SQUARE'>
        <xs:annotation>
          <xs:documentation>
            Mathematical Root Mean Square (RMS) value calculated for the data
            item during the calculation period.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='STANDARD_DEVIATION'>
        <xs:annotation>
          <xs:documentation>
            Statistical Standard Deviation value calculated for the data item
            during the calculation period.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemStatisticsType'>
    <xs:annotation>
      <xs:documentation>
        Statistical operations on data
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='DataItemStatisticsTypeEnum DataItemStatsExtType'/>
  </xs:simpleType>
  <xs:simpleType name='UnitsExtType'>
    <xs:annotation>
      <xs:documentation>
        An extension point for data item types
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:pattern value='x:[A-Z_0-9]+'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='UnitsTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The unit of measurement for the reported value of the data item.
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='PH'>
        <xs:annotation>
          <xs:documentation>
            A measure of the acidity or alkalinity of a solution.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLT_AMPERE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the apparent power in an electrical circuit,
            equal to the product of root-mean-square (RMS) voltage and RMS
            current (commonly referred to as VA).
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLT_AMPERE_REACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of reactive power in an AC electrical circuit
            (commonly referred to as VAR).
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AMPERE'>
        <xs:annotation>
          <xs:documentation>
            Amps
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CELSIUS'>
        <xs:annotation>
          <xs:documentation>
            Degrees Celsius
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='COUNT'>
        <xs:annotation>
          <xs:documentation>
            A count of something.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DECIBEL'>
        <xs:annotation>
          <xs:documentation>
            Sound Level
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEGREE'>
        <xs:annotation>
          <xs:documentation>
            Angle in degrees
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEGREE/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Angular degrees per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEGREE/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Angular acceleration in degrees per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='HERTZ'>
        <xs:annotation>
          <xs:documentation>
            Frequency measured in cycles per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='JOULE'>
        <xs:annotation>
          <xs:documentation>
            A measurement of energy.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='KILOGRAM'>
        <xs:annotation>
          <xs:documentation>
            Kilograms
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LITER/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Liters per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MICRO_RADIAN'>
        <xs:annotation>
          <xs:documentation>
            Measurement of Tilt
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER'>
        <xs:annotation>
          <xs:documentation>
            Millimeters
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Millimeters per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Acceleration in millimeters per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER_3D'>
        <xs:annotation>
          <xs:documentation>
            A point in space identified by X, Y, and Z positions and represented
            by a space-delimited set of numbers each expressed in millimeters.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='NEWTON'>
        <xs:annotation>
          <xs:documentation>
            Force in Newtons
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='NEWTON_METER'>
        <xs:annotation>
          <xs:documentation>
            Torque, a unit for force times distance.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OHM'>
        <xs:annotation>
          <xs:documentation>
            Measure of Electrical Resistance
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PASCAL'>
        <xs:annotation>
          <xs:documentation>
            Pressure in Newtons per square meter
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PASCAL_SECOND'>
        <xs:annotation>
          <xs:documentation>
            Measurement of Viscosity
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PERCENT'>
        <xs:annotation>
          <xs:documentation>
            Percentage
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='REVOLUTION/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Revolutions per minute
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SECOND'>
        <xs:annotation>
          <xs:documentation>
            A measurement of time.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SIEMENS/METER'>
        <xs:annotation>
          <xs:documentation>
            A measurement of Electrical Conductivity
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLT'>
        <xs:annotation>
          <xs:documentation>
            Volts
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WATT'>
        <xs:annotation>
          <xs:documentation>
            Watts
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WATT_SECOND'>
        <xs:annotation>
          <xs:documentation>
            Measurement of electrical energy, equal to one Joule
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LITER'>
        <xs:annotation>
          <xs:documentation>
            Measurement of volume of a fluid
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CUBIC_MILLIMETER'>
        <xs:annotation>
          <xs:documentation>
            Geometric volume in millimeters
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CUBIC_MILLIMETER/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Change of geometric volume per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CUBIC_MILLIMETER/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Change in geometric volume per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIGRAM'>
        <xs:annotation>
          <xs:documentation>
            Milligram 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIGRAM/CUBIC_MILLIMETER'>
        <xs:annotation>
          <xs:documentation>
            Milligram per cubic millimeter 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLILITER'>
        <xs:annotation>
          <xs:documentation>
            Milliliter 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER/REVOLUTION'>
        <xs:annotation>
          <xs:documentation>
            Millimeters per revolution.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='UnitsType'>
    <xs:annotation>
      <xs:documentation>
        The unit of measurement for the reported value of the data item.
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='UnitsTypeEnum UnitsExtType'/>
  </xs:simpleType>
  <xs:simpleType name='NativeUnitsTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The native units of measurement for the reported value of the data item.
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='PH'>
        <xs:annotation>
          <xs:documentation>
            A measure of the acidity or alkalinity of a solution.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLT_AMPERE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of the apparent power in an electrical circuit,
            equal to the product of root-mean-square (RMS) voltage and RMS
            current (commonly referred to as VA).
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLT_AMPERE_REACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The measurement of reactive power in an AC electrical circuit
            (commonly referred to as VAR).
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='AMPERE'>
        <xs:annotation>
          <xs:documentation>
            Amps
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CELSIUS'>
        <xs:annotation>
          <xs:documentation>
            Degrees Celsius
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='COUNT'>
        <xs:annotation>
          <xs:documentation>
            A count of something.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DECIBEL'>
        <xs:annotation>
          <xs:documentation>
            Sound Level
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEGREE'>
        <xs:annotation>
          <xs:documentation>
            Angle in degrees
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEGREE/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Angular degrees per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEGREE/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Angular acceleration in degrees per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='HERTZ'>
        <xs:annotation>
          <xs:documentation>
            Frequency measured in cycles per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='JOULE'>
        <xs:annotation>
          <xs:documentation>
            A measurement of energy.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='KILOGRAM'>
        <xs:annotation>
          <xs:documentation>
            Kilograms
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LITER/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Liters per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MICRO_RADIAN'>
        <xs:annotation>
          <xs:documentation>
            Measurement of Tilt
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER'>
        <xs:annotation>
          <xs:documentation>
            Millimeters
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Millimeters per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Acceleration in millimeters per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER_3D'>
        <xs:annotation>
          <xs:documentation>
            A point in space identified by X, Y, and Z positions and represented
            by a space-delimited set of numbers each expressed in millimeters.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='NEWTON'>
        <xs:annotation>
          <xs:documentation>
            Force in Newtons
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='NEWTON_METER'>
        <xs:annotation>
          <xs:documentation>
            Torque, a unit for force times distance.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OHM'>
        <xs:annotation>
          <xs:documentation>
            Measure of Electrical Resistance
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PASCAL'>
        <xs:annotation>
          <xs:documentation>
            Pressure in Newtons per square meter
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PASCAL_SECOND'>
        <xs:annotation>
          <xs:documentation>
            Measurement of Viscosity
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PERCENT'>
        <xs:annotation>
          <xs:documentation>
            Percentage
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='REVOLUTION/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Revolutions per minute
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SECOND'>
        <xs:annotation>
          <xs:documentation>
            A measurement of time.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SIEMENS/METER'>
        <xs:annotation>
          <xs:documentation>
            A measurement of Electrical Conductivity
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='VOLT'>
        <xs:annotation>
          <xs:documentation>
            Volts
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WATT'>
        <xs:annotation>
          <xs:documentation>
            Watts
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WATT_SECOND'>
        <xs:annotation>
          <xs:documentation>
            Measurement of electrical energy, equal to one Joule
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LITER'>
        <xs:annotation>
          <xs:documentation>
            Measurement of volume of a fluid
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CUBIC_MILLIMETER'>
        <xs:annotation>
          <xs:documentation>
            Geometric volume in millimeters
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CUBIC_MILLIMETER/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Change of geometric volume per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CUBIC_MILLIMETER/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Change in geometric volume per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIGRAM'>
        <xs:annotation>
          <xs:documentation>
            Milligram 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIGRAM/CUBIC_MILLIMETER'>
        <xs:annotation>
          <xs:documentation>
            Milligram per cubic millimeter 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLILITER'>
        <xs:annotation>
          <xs:documentation>
            Milliliter 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER/REVOLUTION'>
        <xs:annotation>
          <xs:documentation>
            Millimeters per revolution.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CENTIPOISE'>
        <xs:annotation>
          <xs:documentation>
            A measure of Viscosity
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DEGREE/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Rotational velocity in degrees per minute
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FAHRENHEIT'>
        <xs:annotation>
          <xs:documentation>
            Temperature in Fahrenheit
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FOOT'>
        <xs:annotation>
          <xs:documentation>
            Feet
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FOOT/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Feet per minute
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FOOT/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Feet per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FOOT/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Acceleration in feet per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FOOT_3D'>
        <xs:annotation>
          <xs:documentation>
            A point in space identified by X, Y, and Z positions and represented
            by a space-delimited set of numbers each expressed in feet.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='GALLON/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Gallons per minute.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INCH'>
        <xs:annotation>
          <xs:documentation>
            Inches
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INCH/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Inches per minute
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INCH/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Inches per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INCH/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Acceleration in inches per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INCH_3D'>
        <xs:annotation>
          <xs:documentation>
            A point in space identified by X, Y, and Z positions and represented
            by a space-delimited set of numbers each expressed in inches.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INCH_POUND'>
        <xs:annotation>
          <xs:documentation>
            A measure of torque in inch pounds.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='KELVIN'>
        <xs:annotation>
          <xs:documentation>
            A measurement of temperature
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='KILOWATT'>
        <xs:annotation>
          <xs:documentation>
            A measurement in kilowatt.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='KILOWATT_HOUR'>
        <xs:annotation>
          <xs:documentation>
            Kilowatt hours which is 3.6 mega joules.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LITER'>
        <xs:annotation>
          <xs:documentation>
            Measurement of volume of a fluid
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LITER/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Measurement of rate of flow of a fluid
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MILLIMETER/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Velocity in millimeters per minute
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OTHER'>
        <xs:annotation>
          <xs:documentation>
            Unsupported units
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='POUND'>
        <xs:annotation>
          <xs:documentation>
            US pounds
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='POUND/INCH^2'>
        <xs:annotation>
          <xs:documentation>
            Pressure in pounds per square inch (PSI).
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='RADIAN'>
        <xs:annotation>
          <xs:documentation>
            Angle in radians
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='RADIAN/MINUTE'>
        <xs:annotation>
          <xs:documentation>
            Velocity in radians per minute.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='RADIAN/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Velocity in radians per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='RADIAN/SECOND^2'>
        <xs:annotation>
          <xs:documentation>
            Rotational acceleration in radian per second squared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='REVOLUTION/SECOND'>
        <xs:annotation>
          <xs:documentation>
            Rotational velocity in revolution per second
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MINUTE'>
        <xs:annotation>
          <xs:documentation>
            A measurement of time in minutes
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='NativeUnitsType'>
    <xs:annotation>
      <xs:documentation>
        The native units of measurement for the reported value of the data item.
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='NativeUnitsTypeEnum UnitsExtType'/>
  </xs:simpleType>
  <xs:simpleType name='CoordinateSystemEnumType'>
    <xs:annotation>
      <xs:documentation>
        The coordinate system to be used for the position
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='MACHINE'>
        <xs:annotation>
          <xs:documentation>
            An unchangeable coordinate system that has machine zero as its
            origin.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WORK'>
        <xs:annotation>
          <xs:documentation>
            The coordinate system that represents the working area for a
            particular workpiece whose origin is shifted within the machine
            coordinate system. If the work coordinates are not currently defined
            in the piece of equipment, the machine coordinates will be used.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemResetValueExtType'>
    <xs:annotation>
      <xs:documentation>
        An extension point for reset types
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:pattern value='[a-ln-z]:[A-Z_0-9]+'/>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemResetValueTypeEnum'>
    <xs:annotation>
      <xs:documentation>
        The reset intervals
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='MAINTENANCE'>
        <xs:annotation>
          <xs:documentation>
            Action related to maintenance on the piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ACTION_COMPLETE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is measuring an action or
            operation is to be reset upon completion of that action or
            operation.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ANNUAL'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity is to be reset at the end of a 12-month
            period.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DAY'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity is to be reset at the end of a 24-hour
            period.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LIFE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data item is not reset and accumulates for the
            entire life of the piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MONTH'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity is to be reset at the end of a monthly
            period.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='POWER_ON'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity is to be reset when power was applied
            to the piece of equipment after a planned or unplanned interruption
            of power has occurred.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SHIFT'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity is to be reset at the end of a work
            shift.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WEEK'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity is to be reset at the end of a 7-day
            period.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='DataItemResetValueType'>
    <xs:annotation>
      <xs:documentation>
        The reset intervals
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='DataItemResetValueTypeEnum DataItemResetValueExtType'/>
  </xs:simpleType>
  <xs:simpleType name='StationType'>
    <xs:annotation>
      <xs:documentation>
        The station id for this device
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:complexType name='HeaderType'>
    <xs:annotation>
      <xs:documentation>
        An XML container in an mtconnect response document that provides
        information from an agent defining version information, storage
        capacity, and parameters associated with the data management within the
        agent.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='xs:string'>
        <xs:attribute name='version' type='VersionType' use='required'>
          <xs:annotation>
            <xs:documentation>
              The protocol version number.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='creationTime' type='CreationTimeType' use='required'>
          <xs:annotation>
            <xs:documentation>
              The time the response was created.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='nextSequence' type='SequenceType' use='required'>
          <xs:annotation>
            <xs:documentation>
              A number representing the sequence number of the piece of
              streaming data that is the next piece of data to be retrieved from
              the buffer of the agent that was not included in the response
              document published by the agent.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='lastSequence' type='SequenceType' use='required'>
          <xs:annotation>
            <xs:documentation>
              A number representing the sequence number assigned to the last
              piece of streaming data that was added to the buffer of the agent
              immediately prior to the time that the agent published the
              response document.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='firstSequence' type='SequenceType' use='required'>
          <xs:annotation>
            <xs:documentation>
              A number representing the sequence number assigned to the oldest
              piece of streaming data stored in the buffer of the agent
              immediately prior to the time that the agent published the
              response document.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='testIndicator' type='TestIndicatorType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              Optional flag that indicates the system is operating in test mode.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='instanceId' type='InstanceIdType' use='required'>
          <xs:annotation>
            <xs:documentation>
              A number indicating which invocation of the agent. 
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='sender' type='SenderType' use='required'>
          <xs:annotation>
            <xs:documentation>
              The agent identification information. 
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='bufferSize' type='BufferSizeType' use='required'>
          <xs:annotation>
            <xs:documentation>
              A value representing the maximum number of data entity that MAY be
              retained in the agent that published the response document at any
              point in time.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name='MTConnectStreamsType'>
    <xs:annotation>
      <xs:documentation>
        It is the root XML element of an mtconnectstreams response document.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name='Header' type='HeaderType'>
        <xs:annotation>
          <xs:documentation>
            An XML container in an mtconnect response document that provides
            information from an agent defining version information, storage
            capacity, and parameters associated with the data management within
            the agent.
          </xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name='Streams' type='StreamsType'>
        <xs:annotation>
          <xs:documentation>
            The first, or highest, level XML container element in an
            mtconnectstreams response Document provided by an agent in response
            to a sample httprequest or current httprequest HTTP request.
          </xs:documentation>
        </xs:annotation>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
  <xs:simpleType name='ResultValueType'>
    <xs:annotation>
      <xs:documentation>
        An events data
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='DataItemIdType'>
    <xs:annotation>
      <xs:documentation>
        The item&apos;s unique ID that references the data item id from probe
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:NMTOKEN'/>
  </xs:simpleType>
  <xs:simpleType name='NativeCodeType'>
    <xs:annotation>
      <xs:documentation>
        An Condition code as defined by the component
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:complexType name='StreamsType'>
    <xs:annotation>
      <xs:documentation>
        The first, or highest, level XML container element in an
        mtconnectstreams response Document provided by an agent in response to a
        sample httprequest or current httprequest HTTP request.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name='DeviceStream' type='DeviceStreamType' minOccurs='0' maxOccurs='unbounded'>
        <xs:annotation>
          <xs:documentation>
            An XML container element provided in the streams container in the
            mtconnectstreams document.
          </xs:documentation>
        </xs:annotation>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name='DeviceStreamType'>
    <xs:annotation>
      <xs:documentation>
        An XML container element provided in the streams container in the
        mtconnectstreams document.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name='ComponentStream' type='ComponentStreamType' minOccurs='0' maxOccurs='unbounded'>
        <xs:annotation>
          <xs:documentation>
            An XML container type element that organizes data returned from an
            agent in response to a current httprequest or sample httprequest
            HTTP request.
          </xs:documentation>
        </xs:annotation>
      </xs:element>
    </xs:sequence>
    <xs:attribute name='name' type='NameType' use='required'>
      <xs:annotation>
        <xs:documentation>
          The name of an element or a piece of equipment.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='uuid' type='UuidType' use='required'>
      <xs:annotation>
        <xs:documentation>
          The unique identifier for an XML element.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  <xs:complexType name='ComponentStreamType'>
    <xs:annotation>
      <xs:documentation>
        An XML container type element that organizes data returned from an agent
        in response to a current httprequest or sample httprequest HTTP request.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name='Samples' type='SamplesType' minOccurs='0' maxOccurs='1'>
        <xs:annotation>
          <xs:documentation>
            An XML container type element that organizes the data reported in
            the mtconnectstreams document for dataitem elements defined in the
            mtconnectdevices document with a category attribute of sample
            category.
          </xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name='Events' type='EventsType' minOccurs='0' maxOccurs='1'>
        <xs:annotation>
          <xs:documentation>
            An XML container type element that organizes the data reported in
            the mtconnectstreams document for dataitem elements defined in the
            mtconnectdevices document with a category attribute of event
            category.
          </xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name='Condition' type='ConditionListType' minOccurs='0' maxOccurs='1'>
        <xs:annotation>
          <xs:documentation>
            An XML container type element that organizes the data reported in
            the mtconnectstreams document for dataitem elements defined in the
            mtconnectdevices document with a category attribute of condition
            category.
          </xs:documentation>
        </xs:annotation>
      </xs:element>
    </xs:sequence>
    <xs:attribute name='componentId' type='ComponentIdType' use='required'>
      <xs:annotation>
        <xs:documentation>
          The identifier attribute of the component element that represents the
          physical part of a piece of equipment where the data represented by
          the dataitem element originated.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='name' type='NameType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          The name of an element or a piece of equipment.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='nativeName' type='NameType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          The common name normally associated with a piece of equipment or an
          element.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='component' type='NameType' use='required'>
      <xs:annotation>
        <xs:documentation>
          An abstract XML element. Replaced in the XML document by types of
          component elements representing physical parts and logical functions
          of a piece of equipment.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='uuid' type='UuidType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          The unique identifier for an XML element.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  <xs:complexType name='SamplesType'>
    <xs:annotation>
      <xs:documentation>
        An XML container type element that organizes the data reported in the
        mtconnectstreams document for dataitem elements defined in the
        mtconnectdevices document with a category attribute of sample category.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element ref='Sample' minOccurs='1' maxOccurs='unbounded'/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name='EventsType'>
    <xs:annotation>
      <xs:documentation>
        An XML container type element that organizes the data reported in the
        mtconnectstreams document for dataitem elements defined in the
        mtconnectdevices document with a category attribute of event category.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element ref='Event' minOccurs='1' maxOccurs='unbounded'/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name='ConditionListType'>
    <xs:annotation>
      <xs:documentation>
        An XML container type element that organizes the data reported in the
        mtconnectstreams document for dataitem elements defined in the
        mtconnectdevices document with a category attribute of condition
        category.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element ref='Condition' minOccurs='1' maxOccurs='unbounded'/>
    </xs:sequence>
  </xs:complexType>
  <xs:simpleType name='UnavailableValueType'>
    <xs:annotation>
      <xs:documentation>
        The observation value for indeterminent data
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Data is unavailable
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:attributeGroup name='ObservationType'>
    <xs:attribute name='sequence' type='SequenceType' use='required'>
      <xs:annotation>
        <xs:documentation>
          A number representing the sequential position of an occurrence of a
          category type in the data buffer of an agent. 
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='subType' type='DataItemSubEnumType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          A sub-categorization of the data item type.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='timestamp' type='TimestampType' use='required'>
      <xs:annotation>
        <xs:documentation>
          The most accurate time available to a piece of equipment that
          represents the point in time that the data was reported.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='name' type='NameType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          The name of an element or a piece of equipment.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='dataItemId' type='DataItemIdType' use='required'>
      <xs:annotation>
        <xs:documentation>
          The identifier attribute of the dataitem that represents the
          originally measured value of the data referenced by this data item.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='compositionId' type='CompositionIdType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          The identifier attribute of the composition element that the reported
          data is most closely associated. 
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:attributeGroup>
  <xs:simpleType name='SampleRateType'>
    <xs:annotation>
      <xs:documentation>
        The target rate a value can be sampled
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:float'/>
  </xs:simpleType>
  <xs:simpleType name='CountValueType'>
    <xs:annotation>
      <xs:documentation>
        The number of items in the list
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:integer'/>
  </xs:simpleType>
  <xs:simpleType name='FloatSampleValueType'>
    <xs:annotation>
      <xs:documentation>
        Common floating point sample value
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='xs:float UnavailableValueType'/>
  </xs:simpleType>
  <xs:simpleType name='ThreeSpaceSampleValueType'>
    <xs:annotation>
      <xs:documentation>
        Common floating point sample value
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='ThreeSpaceValueType UnavailableValueType'/>
  </xs:simpleType>
  <xs:complexType name='SampleType' abstract='true' mixed='true'>
    <xs:annotation>
      <xs:documentation>
        An XML element that provides the information and data reported from a
        piece of equipment for those dataitem elements defined with a category
        attribute of sample category in the mtconnectdevices document. 
      </xs:documentation>
    </xs:annotation>
    <xs:attributeGroup ref='ObservationType'/>
    <xs:attribute name='sampleRate' type='SampleRateType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          The rate at which successive samples of a data item are recorded by a
          piece of equipment.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='resetTriggered' type='DataItemResetValueType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          For those dataitem elements that report data that may be periodically
          reset to an initial value, resettriggered identifies when a reported
          value has been reset and what has caused that reset to occur.
          resetTriggered is an optional attribute. resettriggered MUST only be
          provided for the specific occurrence of a data entity reported in the
          mtconnectstreams document when the reset occurred and MUSTNOT be
          provided for any other occurrence of the data entity reported in a
          mtconnectstreams document.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='statistic' type='DataItemStatisticsType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          Describes the type of statistical calculation performed on a series of
          data samples to provide the reported data value.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='duration' type='DurationTimeType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          The time-period over which the data was collected.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  <xs:element abstract='true' name='Sample' type='SampleType'>
    <xs:annotation>
      <xs:documentation>
        An XML element that provides the information and data reported from a
        piece of equipment for those dataitem elements defined with a category
        attribute of sample category in the mtconnectdevices document. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CommonSampleType'>
    <xs:annotation>
      <xs:documentation>
        A sample with a single floating point value
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='SampleType'>
        <xs:simpleType>
          <xs:restriction base='FloatSampleValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CommonSample' type='CommonSampleType' substitutionGroup='Sample'>
    <xs:annotation>
      <xs:documentation>
        A sample with a single floating point value
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ThreeSpaceSampleType'>
    <xs:annotation>
      <xs:documentation>
        A sample with a three tuple floating point value
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='SampleType'>
        <xs:simpleType>
          <xs:restriction base='ThreeSpaceSampleValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ThreeSpaceSample' type='ThreeSpaceSampleType' substitutionGroup='Sample'>
    <xs:annotation>
      <xs:documentation>
        A sample with a three tuple floating point value
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AbsTimeSeriesType' abstract='true'>
    <xs:annotation>
      <xs:documentation>
        It is an abstract type element and will be replaced in the
        mtconnectstreams document by the element name derived from the type
        attribute defined for the associated dataitem element defined in the
        mtconnectdevices document
      </xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base='SampleType'>
        <xs:attribute name='sampleCount' type='CountValueType' use='required'>
          <xs:annotation>
            <xs:documentation>
              The number of readings reported in the data returned for the
              dataitem element defined in the mtconnectdevices document that
              this sample element represents.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:element abstract='true' name='AbsTimeSeries' type='AbsTimeSeriesType' substitutionGroup='Sample'>
    <xs:annotation>
      <xs:documentation>
        It is an abstract type element and will be replaced in the
        mtconnectstreams document by the element name derived from the type
        attribute defined for the associated dataitem element defined in the
        mtconnectdevices document
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TimeSeriesType' abstract='true'>
    <xs:annotation>
      <xs:documentation>
        An abstract time series with the restriction value
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='AbsTimeSeriesType'>
        <xs:simpleType>
          <xs:restriction base='FloatListValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element abstract='true' name='TimeSeries' type='TimeSeriesType' substitutionGroup='AbsTimeSeries'>
    <xs:annotation>
      <xs:documentation>
        An abstract time series with the restriction value
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AccelerationType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rate of change of velocity.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Acceleration' type='AccelerationType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rate of change of velocity.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AccelerationTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rate of change of velocity.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AccelerationTimeSeries' type='AccelerationTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rate of change of velocity.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AccumulatedTimeType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of accumulated time for an activity or event.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AccumulatedTime' type='AccumulatedTimeType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of accumulated time for an activity or event.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AccumulatedTimeTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of accumulated time for an activity or
        event.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AccumulatedTimeTimeSeries' type='AccumulatedTimeTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of accumulated time for an activity or
        event.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AmperageType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of electrical current.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Amperage' type='AmperageType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of electrical current.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AmperageTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of electrical current.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AmperageTimeSeries' type='AmperageTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of electrical current.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AngleType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of angular position.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Angle' type='AngleType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of angular position.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AngleTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of angular position.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AngleTimeSeries' type='AngleTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of angular position.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AngularAccelerationType'>
    <xs:annotation>
      <xs:documentation>
        The measurement rate of change of angular velocity.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AngularAcceleration' type='AngularAccelerationType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement rate of change of angular velocity.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AngularAccelerationTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement rate of change of angular velocity.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AngularAccelerationTimeSeries' type='AngularAccelerationTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement rate of change of angular velocity.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AngularVelocityType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rate of change of angular position.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AngularVelocity' type='AngularVelocityType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rate of change of angular position.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AngularVelocityTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rate of change of angular
        position.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AngularVelocityTimeSeries' type='AngularVelocityTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rate of change of angular
        position.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AxisFeedrateType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the feedrate of a linear axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AxisFeedrate' type='AxisFeedrateType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the feedrate of a linear axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AxisFeedrateTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the feedrate of a linear axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AxisFeedrateTimeSeries' type='AxisFeedrateTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the feedrate of a linear axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ClockTimeType'>
    <xs:annotation>
      <xs:documentation>
        The value provided by a timing device at a specific point in time.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ClockTime' type='ClockTimeType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The value provided by a timing device at a specific point in time.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ClockTimeTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The value provided by a timing device at a specific point
        in time.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ClockTimeTimeSeries' type='ClockTimeTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The value provided by a timing device at a specific point
        in time.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ConcentrationType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the percentage of one component within a mixture of
        components
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Concentration' type='ConcentrationType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the percentage of one component within a mixture of
        components
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ConcentrationTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the percentage of one component within
        a mixture of components
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ConcentrationTimeSeries' type='ConcentrationTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the percentage of one component within
        a mixture of components
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ConductivityType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the ability of a material to conduct electricity.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Conductivity' type='ConductivityType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the ability of a material to conduct electricity.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ConductivityTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the ability of a material to conduct
        electricity.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ConductivityTimeSeries' type='ConductivityTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the ability of a material to conduct
        electricity.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DisplacementType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the change in position of an object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Displacement' type='DisplacementType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the change in position of an object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DisplacementTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the change in position of an object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DisplacementTimeSeries' type='DisplacementTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the change in position of an object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ElectricalEnergyType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of electrical energy consumption by a component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ElectricalEnergy' type='ElectricalEnergyType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of electrical energy consumption by a component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ElectricalEnergyTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of electrical energy consumption by a
        component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ElectricalEnergyTimeSeries' type='ElectricalEnergyTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of electrical energy consumption by a
        component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='EquipmentTimerType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the amount of time a piece of equipment or a sub-part
        of a piece of equipment has performed specific activities.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='EquipmentTimer' type='EquipmentTimerType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the amount of time a piece of equipment or a sub-part
        of a piece of equipment has performed specific activities.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='EquipmentTimerTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the amount of time a piece of
        equipment or a sub-part of a piece of equipment has performed specific
        activities.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='EquipmentTimerTimeSeries' type='EquipmentTimerTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the amount of time a piece of
        equipment or a sub-part of a piece of equipment has performed specific
        activities.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='FillLevelType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the amount of a substance remaining compared to the
        planned maximum amount of that substance.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='FillLevel' type='FillLevelType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the amount of a substance remaining compared to the
        planned maximum amount of that substance.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='FillLevelTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the amount of a substance remaining
        compared to the planned maximum amount of that substance.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='FillLevelTimeSeries' type='FillLevelTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the amount of a substance remaining
        compared to the planned maximum amount of that substance.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='FlowType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rate of flow of a fluid.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Flow' type='FlowType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rate of flow of a fluid.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='FlowTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rate of flow of a fluid.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='FlowTimeSeries' type='FlowTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rate of flow of a fluid.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='FrequencyType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the number of occurrences of a repeating event per
        unit time.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Frequency' type='FrequencyType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the number of occurrences of a repeating event per
        unit time.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='FrequencyTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the number of occurrences of a
        repeating event per unit time.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='FrequencyTimeSeries' type='FrequencyTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the number of occurrences of a
        repeating event per unit time.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='GlobalPositionType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.1
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='GlobalPosition' type='GlobalPositionType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.1
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='GlobalPositionTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of DEPRECATED in Version 1.1
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='GlobalPositionTimeSeries' type='GlobalPositionTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of DEPRECATED in Version 1.1
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LengthType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the length of an object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Length' type='LengthType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the length of an object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LengthTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the length of an object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='LengthTimeSeries' type='LengthTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the length of an object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LevelType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.2. See filllevel sample
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Level' type='LevelType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.2. See filllevel sample
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LevelTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of DEPRECATED in Version 1.2. See filllevel sample
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='LevelTimeSeries' type='LevelTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of DEPRECATED in Version 1.2. See filllevel sample
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LinearForceType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the push or pull introduced by an actuator or exerted
        on an object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='LinearForce' type='LinearForceType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the push or pull introduced by an actuator or exerted
        on an object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LinearForceTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the push or pull introduced by an
        actuator or exerted on an object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='LinearForceTimeSeries' type='LinearForceTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the push or pull introduced by an
        actuator or exerted on an object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LoadType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the actual versus the standard rating of a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Load' type='LoadType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the actual versus the standard rating of a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LoadTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the actual versus the standard rating
        of a piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='LoadTimeSeries' type='LoadTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the actual versus the standard rating
        of a piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MassType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the mass of an object(s) or an amount of material.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Mass' type='MassType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the mass of an object(s) or an amount of material.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MassTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the mass of an object(s) or an amount
        of material.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='MassTimeSeries' type='MassTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the mass of an object(s) or an amount
        of material.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PathFeedrateType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the feedrate for the axes, or a single axis,
        associated with a path component-a vector.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PathFeedrate' type='PathFeedrateType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the feedrate for the axes, or a single axis,
        associated with a path component-a vector.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PathFeedrateTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the feedrate for the axes, or a single
        axis, associated with a path component-a vector.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PathFeedrateTimeSeries' type='PathFeedrateTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the feedrate for the axes, or a single
        axis, associated with a path component-a vector.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PathPositionType'>
    <xs:annotation>
      <xs:documentation>
        A measured or calculated position of a control point associated with a
        controller element, or path element if provided, of a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ThreeSpaceSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PathPosition' type='PathPositionType' substitutionGroup='ThreeSpaceSample'>
    <xs:annotation>
      <xs:documentation>
        A measured or calculated position of a control point associated with a
        controller element, or path element if provided, of a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PHType'>
    <xs:annotation>
      <xs:documentation>
        A measure of the acidity or alkalinity of a solution.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PH' type='PHType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        A measure of the acidity or alkalinity of a solution.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PHTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of A measure of the acidity or alkalinity of a solution.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PHTimeSeries' type='PHTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of A measure of the acidity or alkalinity of a solution.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PositionType'>
    <xs:annotation>
      <xs:documentation>
        A measured or calculated position of a component element as reported by
        a piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Position' type='PositionType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        A measured or calculated position of a component element as reported by
        a piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PositionTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of A measured or calculated position of a component element
        as reported by a piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PositionTimeSeries' type='PositionTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of A measured or calculated position of a component element
        as reported by a piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PowerFactorType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the ratio of real power flowing to a load to the
        apparent power in that AC circuit.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PowerFactor' type='PowerFactorType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the ratio of real power flowing to a load to the
        apparent power in that AC circuit.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PowerFactorTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the ratio of real power flowing to a
        load to the apparent power in that AC circuit.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PowerFactorTimeSeries' type='PowerFactorTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the ratio of real power flowing to a
        load to the apparent power in that AC circuit.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PressureType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of force per unit area exerted by a gas or liquid.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Pressure' type='PressureType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of force per unit area exerted by a gas or liquid.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PressureTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of force per unit area exerted by a gas
        or liquid.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PressureTimeSeries' type='PressureTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of force per unit area exerted by a gas
        or liquid.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProcessTimerType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the amount of time a piece of equipment has performed
        different types of activities associated with the process being
        performed at that piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProcessTimer' type='ProcessTimerType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the amount of time a piece of equipment has performed
        different types of activities associated with the process being
        performed at that piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProcessTimerTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the amount of time a piece of
        equipment has performed different types of activities associated with
        the process being performed at that piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProcessTimerTimeSeries' type='ProcessTimerTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the amount of time a piece of
        equipment has performed different types of activities associated with
        the process being performed at that piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ResistanceType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the degree to which a substance opposes the passage
        of an electric current.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Resistance' type='ResistanceType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the degree to which a substance opposes the passage
        of an electric current.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ResistanceTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the degree to which a substance
        opposes the passage of an electric current.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ResistanceTimeSeries' type='ResistanceTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the degree to which a substance
        opposes the passage of an electric current.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='RotaryVelocityType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rotational speed of a rotary axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='RotaryVelocity' type='RotaryVelocityType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rotational speed of a rotary axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='RotaryVelocityTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rotational speed of a rotary axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='RotaryVelocityTimeSeries' type='RotaryVelocityTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rotational speed of a rotary axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='SoundLevelType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of a sound level or sound pressure level relative to
        atmospheric pressure.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='SoundLevel' type='SoundLevelType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of a sound level or sound pressure level relative to
        atmospheric pressure.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='SoundLevelTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of a sound level or sound pressure level
        relative to atmospheric pressure.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='SoundLevelTimeSeries' type='SoundLevelTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of a sound level or sound pressure level
        relative to atmospheric pressure.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='SpindleSpeedType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.2. Replaced by rotaryvelocity sample
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='SpindleSpeed' type='SpindleSpeedType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.2. Replaced by rotaryvelocity sample
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='SpindleSpeedTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of DEPRECATED in Version 1.2. Replaced by rotaryvelocity
        sample
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='SpindleSpeedTimeSeries' type='SpindleSpeedTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of DEPRECATED in Version 1.2. Replaced by rotaryvelocity
        sample
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='StrainType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the amount of deformation per unit length of an
        object when a load is applied.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Strain' type='StrainType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the amount of deformation per unit length of an
        object when a load is applied.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='StrainTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the amount of deformation per unit
        length of an object when a load is applied.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='StrainTimeSeries' type='StrainTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the amount of deformation per unit
        length of an object when a load is applied.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TemperatureType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of temperature.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Temperature' type='TemperatureType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of temperature.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TemperatureTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of temperature.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='TemperatureTimeSeries' type='TemperatureTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of temperature.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TensionType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of a force that stretches or elongates an object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Tension' type='TensionType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of a force that stretches or elongates an object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TensionTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of a force that stretches or elongates an
        object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='TensionTimeSeries' type='TensionTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of a force that stretches or elongates an
        object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TiltType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of angular displacement. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Tilt' type='TiltType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of angular displacement. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TiltTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of angular displacement. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='TiltTimeSeries' type='TiltTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of angular displacement. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TorqueType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the turning force exerted on an object or by an
        object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Torque' type='TorqueType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the turning force exerted on an object or by an
        object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='TorqueTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the turning force exerted on an object
        or by an object.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='TorqueTimeSeries' type='TorqueTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the turning force exerted on an object
        or by an object.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VelocityType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rate of change of position of a component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Velocity' type='VelocityType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the rate of change of position of a component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VelocityTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rate of change of position of a
        component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VelocityTimeSeries' type='VelocityTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the rate of change of position of a
        component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ViscosityType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of a fluids resistance to flow.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Viscosity' type='ViscosityType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of a fluids resistance to flow.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ViscosityTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of a fluids resistance to flow.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ViscosityTimeSeries' type='ViscosityTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of a fluids resistance to flow.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VoltAmpereType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the apparent power in an electrical circuit, equal to
        the product of root-mean-square (RMS) voltage and RMS current (commonly
        referred to as VA).
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VoltAmpere' type='VoltAmpereType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the apparent power in an electrical circuit, equal to
        the product of root-mean-square (RMS) voltage and RMS current (commonly
        referred to as VA).
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VoltAmpereTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the apparent power in an electrical
        circuit, equal to the product of root-mean-square (RMS) voltage and RMS
        current (commonly referred to as VA).
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VoltAmpereTimeSeries' type='VoltAmpereTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of the apparent power in an electrical
        circuit, equal to the product of root-mean-square (RMS) voltage and RMS
        current (commonly referred to as VA).
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VoltAmpereReactiveType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of reactive power in an AC electrical circuit (commonly
        referred to as VAR).
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VoltAmpereReactive' type='VoltAmpereReactiveType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of reactive power in an AC electrical circuit (commonly
        referred to as VAR).
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VoltAmpereReactiveTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of reactive power in an AC electrical
        circuit (commonly referred to as VAR).
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VoltAmpereReactiveTimeSeries' type='VoltAmpereReactiveTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of reactive power in an AC electrical
        circuit (commonly referred to as VAR).
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VoltageType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of electrical potential between two points.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Voltage' type='VoltageType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of electrical potential between two points.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VoltageTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of electrical potential between two
        points.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VoltageTimeSeries' type='VoltageTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of electrical potential between two
        points.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='WattageType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of power flowing through or dissipated by an electrical
        circuit or piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Wattage' type='WattageType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The measurement of power flowing through or dissipated by an electrical
        circuit or piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='WattageTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of power flowing through or dissipated by
        an electrical circuit or piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='WattageTimeSeries' type='WattageTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The measurement of power flowing through or dissipated by
        an electrical circuit or piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VolumeSpatialType'>
    <xs:annotation>
      <xs:documentation>
        The geometric volume of an object or container.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VolumeSpatial' type='VolumeSpatialType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The geometric volume of an object or container.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VolumeSpatialTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The geometric volume of an object or container.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VolumeSpatialTimeSeries' type='VolumeSpatialTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The geometric volume of an object or container.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VolumeFluidType'>
    <xs:annotation>
      <xs:documentation>
        The fluid volume of an object or container.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VolumeFluid' type='VolumeFluidType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The fluid volume of an object or container.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VolumeFluidTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The fluid volume of an object or container.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VolumeFluidTimeSeries' type='VolumeFluidTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The fluid volume of an object or container.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CapacitySpatialType'>
    <xs:annotation>
      <xs:documentation>
        The geometric capacity of an object or container.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CapacitySpatial' type='CapacitySpatialType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The geometric capacity of an object or container.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CapacitySpatialTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The geometric capacity of an object or container.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CapacitySpatialTimeSeries' type='CapacitySpatialTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The geometric capacity of an object or container.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CapacityFluidType'>
    <xs:annotation>
      <xs:documentation>
        The fluid capacity of an object or container.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CapacityFluid' type='CapacityFluidType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The fluid capacity of an object or container.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CapacityFluidTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The fluid capacity of an object or container.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CapacityFluidTimeSeries' type='CapacityFluidTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The fluid capacity of an object or container.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DensityType'>
    <xs:annotation>
      <xs:documentation>
        The volumetric mass of a material per unit volume of that material.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Density' type='DensityType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The volumetric mass of a material per unit volume of that material.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DensityTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The volumetric mass of a material per unit volume of that
        material.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DensityTimeSeries' type='DensityTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The volumetric mass of a material per unit volume of that
        material.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionVolumeType'>
    <xs:annotation>
      <xs:documentation>
        The spatial volume of material to be deposited in an additive
        manufacturing process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionVolume' type='DepositionVolumeType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The spatial volume of material to be deposited in an additive
        manufacturing process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionVolumeTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The spatial volume of material to be deposited in an
        additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionVolumeTimeSeries' type='DepositionVolumeTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The spatial volume of material to be deposited in an
        additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionRateVolumetricType'>
    <xs:annotation>
      <xs:documentation>
        The rate at which a spatial volume of material is deposited in an
        additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionRateVolumetric' type='DepositionRateVolumetricType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The rate at which a spatial volume of material is deposited in an
        additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionRateVolumetricTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The rate at which a spatial volume of material is
        deposited in an additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionRateVolumetricTimeSeries' type='DepositionRateVolumetricTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The rate at which a spatial volume of material is
        deposited in an additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionAccelerationVolumetricType'>
    <xs:annotation>
      <xs:documentation>
        The rate of change in spatial volume of material deposited in an
        additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionAccelerationVolumetric' type='DepositionAccelerationVolumetricType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The rate of change in spatial volume of material deposited in an
        additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionAccelerationVolumetricTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The rate of change in spatial volume of material
        deposited in an additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionAccelerationVolumetricTimeSeries' type='DepositionAccelerationVolumetricTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The rate of change in spatial volume of material
        deposited in an additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionMassType'>
    <xs:annotation>
      <xs:documentation>
        The mass of the material deposited in an additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionMass' type='DepositionMassType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The mass of the material deposited in an additive manufacturing process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionMassTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The mass of the material deposited in an additive
        manufacturing process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionMassTimeSeries' type='DepositionMassTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The mass of the material deposited in an additive
        manufacturing process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionDensityType'>
    <xs:annotation>
      <xs:documentation>
        The density of the material deposited in an additive manufacturing
        process per unit of volume.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionDensity' type='DepositionDensityType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The density of the material deposited in an additive manufacturing
        process per unit of volume.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DepositionDensityTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The density of the material deposited in an additive
        manufacturing process per unit of volume.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DepositionDensityTimeSeries' type='DepositionDensityTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The density of the material deposited in an additive
        manufacturing process per unit of volume.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CuttingSpeedType'>
    <xs:annotation>
      <xs:documentation>
         The speed difference (relative velocity) between the cutting mechanism
        and the surface of the workpiece it is operating on.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CuttingSpeed' type='CuttingSpeedType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
         The speed difference (relative velocity) between the cutting mechanism
        and the surface of the workpiece it is operating on.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CuttingSpeedTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The speed difference (relative velocity) between the
        cutting mechanism and the surface of the workpiece it is operating on.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CuttingSpeedTimeSeries' type='CuttingSpeedTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The speed difference (relative velocity) between the
        cutting mechanism and the surface of the workpiece it is operating on.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PathFeedratePerRevolutionType'>
    <xs:annotation>
      <xs:documentation>
        The feedrate for the axes, or a single axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='CommonSampleType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PathFeedratePerRevolution' type='PathFeedratePerRevolutionType' substitutionGroup='CommonSample'>
    <xs:annotation>
      <xs:documentation>
        The feedrate for the axes, or a single axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PathFeedratePerRevolutionTimeSeriesType'>
    <xs:annotation>
      <xs:documentation>
        Time series of The feedrate for the axes, or a single axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='TimeSeriesType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PathFeedratePerRevolutionTimeSeries' type='PathFeedratePerRevolutionTimeSeriesType' substitutionGroup='TimeSeries'>
    <xs:annotation>
      <xs:documentation>
        Time series of The feedrate for the axes, or a single axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='IntegerEventValueType'>
    <xs:annotation>
      <xs:documentation>
        Integer event value
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='xs:integer UnavailableValueType'/>
  </xs:simpleType>
  <xs:simpleType name='FloatEventValueType'>
    <xs:annotation>
      <xs:documentation>
        Integer event value
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='xs:float UnavailableValueType'/>
  </xs:simpleType>
  <xs:simpleType name='StringEventValueType'>
    <xs:annotation>
      <xs:documentation>
        Srring event value
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='xs:string UnavailableValueType'/>
  </xs:simpleType>
  <xs:simpleType name='StringListValueType'>
    <xs:annotation>
      <xs:documentation>
        A list of axis names
      </xs:documentation>
    </xs:annotation>
    <xs:list>
      <xs:simpleType>
        <xs:restriction base='xs:string'/>
      </xs:simpleType>
    </xs:list>
  </xs:simpleType>
  <xs:simpleType name='StringListEventValueType'>
    <xs:annotation>
      <xs:documentation>
        A list of axis for an event
      </xs:documentation>
    </xs:annotation>
    <xs:union memberTypes='StringListValueType UnavailableValueType'/>
  </xs:simpleType>
  <xs:complexType name='EventType' abstract='true' mixed='true'>
    <xs:annotation>
      <xs:documentation>
        An XML element which provides the information and data reported from a
        piece of equipment for those dataitem elements defined with a category
        attribute of event category in the mtconnectdevices document.
      </xs:documentation>
    </xs:annotation>
    <xs:attributeGroup ref='ObservationType'/>
    <xs:attribute name='resetTriggered' type='DataItemResetValueType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          For those dataitem elements that report data that may be periodically
          reset to an initial value, resettriggered identifies when a reported
          value has been reset and what has caused that reset to occur.
          resetTriggered is an optional attribute. resettriggered MUST only be
          provided for the specific occurrence of a data entity reported in the
          mtconnectstreams document when the reset occurred and MUSTNOT be
          provided for any other occurrence of the data entity reported in a
          mtconnectstreams document.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  <xs:element abstract='true' name='Event' type='EventType'>
    <xs:annotation>
      <xs:documentation>
        An XML element which provides the information and data reported from a
        piece of equipment for those dataitem elements defined with a category
        attribute of event category in the mtconnectdevices document.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='StringEventType'>
    <xs:annotation>
      <xs:documentation>
        An unfaceted string event
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='StringEventValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='StringEvent' type='StringEventType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An unfaceted string event
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='StringListEventType'>
    <xs:annotation>
      <xs:documentation>
        An unfaceted string event
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='StringListEventValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='StringListEvent' type='StringListEventType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An unfaceted string event
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='IntegerEventType'>
    <xs:annotation>
      <xs:documentation>
        An event with an integer value
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='IntegerEventValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='IntegerEvent' type='IntegerEventType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An event with an integer value
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='FloatEventType'>
    <xs:annotation>
      <xs:documentation>
        An event with an integer value
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='FloatEventValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='FloatEvent' type='FloatEventType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An event with an integer value
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ActiveAxesType'>
    <xs:annotation>
      <xs:documentation>
        The set of axes currently associated with a path or controller
        structural element.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringListEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ActiveAxes' type='ActiveAxesType' substitutionGroup='StringListEvent'>
    <xs:annotation>
      <xs:documentation>
        The set of axes currently associated with a path or controller
        structural element.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='ActuatorStateValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for ActuatorState
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is not engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ActuatorStateType'>
    <xs:annotation>
      <xs:documentation>
        Represents the operational state of an apparatus for moving or
        controlling a mechanism or system.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='ActuatorStateValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ActuatorState' type='ActuatorStateType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        Represents the operational state of an apparatus for moving or
        controlling a mechanism or system.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='AvailabilityValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for Availability
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='AVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            The value or status of an XML element when it is available.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity either when the data is not received or
            the entity is incapable of providing data.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='AvailabilityType'>
    <xs:annotation>
      <xs:documentation>
        Represents the agent&apos;s ability to communicate with the data source.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='AvailabilityValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Availability' type='AvailabilityType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        Represents the agent&apos;s ability to communicate with the data source.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='AxisCouplingValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for AxisCoupling
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='TANDEM'>
        <xs:annotation>
          <xs:documentation>
            Elements are physically connected to each other and operate as a
            single unit.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SYNCHRONOUS'>
        <xs:annotation>
          <xs:documentation>
            Physical or logical parts which are not physically connected to each
            other but are operating together.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MASTER'>
        <xs:annotation>
          <xs:documentation>
            It provides information or state values that influences the
            operation of other dataitem of similar type.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SLAVE'>
        <xs:annotation>
          <xs:documentation>
            The axis is a slave to the coupledaxes event
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='AxisCouplingType'>
    <xs:annotation>
      <xs:documentation>
        Describes the way the axes will be associated to each other. This is
        used in conjunction with coupledaxes event to indicate the way they are
        interacting.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='AxisCouplingValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AxisCoupling' type='AxisCouplingType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        Describes the way the axes will be associated to each other. This is
        used in conjunction with coupledaxes event to indicate the way they are
        interacting.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AxisFeedrateOverrideType'>
    <xs:annotation>
      <xs:documentation>
        The value of a signal or calculation issued to adjust the feedrate of an
        individual linear type axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='FloatEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AxisFeedrateOverride' type='AxisFeedrateOverrideType' substitutionGroup='FloatEvent'>
    <xs:annotation>
      <xs:documentation>
        The value of a signal or calculation issued to adjust the feedrate of an
        individual linear type axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='AxisInterlockValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for AxisInterlock
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is not engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='AxisInterlockType'>
    <xs:annotation>
      <xs:documentation>
        An indicator of the state of the axis lockout function when power has
        been removed and the axis is allowed to move freely.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='AxisInterlockValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AxisInterlock' type='AxisInterlockType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indicator of the state of the axis lockout function when power has
        been removed and the axis is allowed to move freely.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='AxisStateValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for AxisState
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='HOME'>
        <xs:annotation>
          <xs:documentation>
            The component at its home position.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TRAVEL'>
        <xs:annotation>
          <xs:documentation>
            The component is in motion.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PARKED'>
        <xs:annotation>
          <xs:documentation>
            The component has been moved to a fixed position.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='STOPPED'>
        <xs:annotation>
          <xs:documentation>
            The component is stopped.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='AxisStateType'>
    <xs:annotation>
      <xs:documentation>
        An indicator of the controlled state of a linear or rotary component
        representing an axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='AxisStateValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AxisState' type='AxisStateType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indicator of the controlled state of a linear or rotary component
        representing an axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='BlockType'>
    <xs:annotation>
      <xs:documentation>
        The line of code or command being executed by a controller structural
        element.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Block' type='BlockType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The line of code or command being executed by a controller structural
        element.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='BlockCountType'>
    <xs:annotation>
      <xs:documentation>
        The total count of the number of blocks of program code that have been
        executed since execution started.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='IntegerEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='BlockCount' type='BlockCountType' substitutionGroup='IntegerEvent'>
    <xs:annotation>
      <xs:documentation>
        The total count of the number of blocks of program code that have been
        executed since execution started.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='ChuckInterlockValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for ChuckInterlock
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is not engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ChuckInterlockType'>
    <xs:annotation>
      <xs:documentation>
        An indication of the state of an interlock function or control logic
        state intended to prevent the associated chuck component from being
        operated.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='ChuckInterlockValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ChuckInterlock' type='ChuckInterlockType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indication of the state of an interlock function or control logic
        state intended to prevent the associated chuck component from being
        operated.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='ChuckStateValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for ChuckState
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='OPEN'>
        <xs:annotation>
          <xs:documentation>
            A component is open to the point of a positive confirmation.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CLOSED'>
        <xs:annotation>
          <xs:documentation>
            A component is closed to the point of a positive confirmation.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNLATCHED'>
        <xs:annotation>
          <xs:documentation>
            An intermediate position.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ChuckStateType'>
    <xs:annotation>
      <xs:documentation>
        An indication of the operating state of a mechanism that holds a part or
        stock material during a manufacturing process. It may also represent a
        mechanism that holds any other mechanism in place within a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='ChuckStateValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ChuckState' type='ChuckStateType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indication of the operating state of a mechanism that holds a part or
        stock material during a manufacturing process. It may also represent a
        mechanism that holds any other mechanism in place within a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CodeType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.1.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Code' type='CodeType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.1.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CompositionStateType'>
    <xs:annotation>
      <xs:documentation>
        An indication of the operating condition of a mechanism represented by a
        composition type element.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CompositionState' type='CompositionStateType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        An indication of the operating condition of a mechanism represented by a
        composition type element.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='ControllerModeValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for ControllerMode
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='AUTOMATIC'>
        <xs:annotation>
          <xs:documentation>
            The controller is configured to automatically execute a program.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MANUAL'>
        <xs:annotation>
          <xs:documentation>
            Operations based on the instructions received from an external
            source.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MANUAL_DATA_INPUT'>
        <xs:annotation>
          <xs:documentation>
            The operator can enter a series of operations for the controller to
            perform.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SEMI_AUTOMATIC'>
        <xs:annotation>
          <xs:documentation>
            The controller executes a single set of instructions from an active
            program and then stops until given a command to execute the next set
            of instructions.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='EDIT'>
        <xs:annotation>
          <xs:documentation>
            The controller is currently functioning as a programming device and
            is not capable of executing an active program.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ControllerModeType'>
    <xs:annotation>
      <xs:documentation>
        The current operating mode of the controller component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='ControllerModeValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ControllerMode' type='ControllerModeType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        The current operating mode of the controller component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='ControllerModeOverrideValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for ControllerModeOverride
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ON'>
        <xs:annotation>
          <xs:documentation>
            On state or value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OFF'>
        <xs:annotation>
          <xs:documentation>
            Off state or value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ControllerModeOverrideType'>
    <xs:annotation>
      <xs:documentation>
        A setting or operator selection that changes the behavior of a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='ControllerModeOverrideValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ControllerModeOverride' type='ControllerModeOverrideType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        A setting or operator selection that changes the behavior of a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CoupledAxesType'>
    <xs:annotation>
      <xs:documentation>
        Refers to the set of associated axes.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringListEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CoupledAxes' type='CoupledAxesType' substitutionGroup='StringListEvent'>
    <xs:annotation>
      <xs:documentation>
        Refers to the set of associated axes.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DirectionType'>
    <xs:annotation>
      <xs:documentation>
        The direction of motion.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Direction' type='DirectionType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The direction of motion.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='DoorStateValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for DoorState
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='CLOSED'>
        <xs:annotation>
          <xs:documentation>
            A component is closed to the point of a positive confirmation.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CLOSED'>
        <xs:annotation>
          <xs:documentation>
            A component is closed to the point of a positive confirmation.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNLATCHED'>
        <xs:annotation>
          <xs:documentation>
            An intermediate position.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='DoorStateType'>
    <xs:annotation>
      <xs:documentation>
        The operational state of a door type component or composition element.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='DoorStateValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DoorState' type='DoorStateType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        The operational state of a door type component or composition element.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='EmergencyStopValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for EmergencyStop
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ARMED'>
        <xs:annotation>
          <xs:documentation>
            The emergency stop circuit is complete and the piece of equipment,
            component, or composition element is allowed to operate. 
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TRIGGERED'>
        <xs:annotation>
          <xs:documentation>
            The operation of the piece of equipment, component, or composition
            element is inhibited.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='EmergencyStopType'>
    <xs:annotation>
      <xs:documentation>
        The current state of the emergency stop signal for a piece of equipment,
        controller path, or any other component or subsystem of a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='EmergencyStopValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='EmergencyStop' type='EmergencyStopType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        The current state of the emergency stop signal for a piece of equipment,
        controller path, or any other component or subsystem of a piece of
        equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='EndOfBarValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for EndOfBar
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='YES'>
        <xs:annotation>
          <xs:documentation>
            The endofbar event has been reached.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='NO'>
        <xs:annotation>
          <xs:documentation>
            The endofbar event has not been reached.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='EndOfBarType'>
    <xs:annotation>
      <xs:documentation>
        An indication of whether the end of a piece of bar stock being feed by a
        bar feeder has been reached.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='EndOfBarValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='EndOfBar' type='EndOfBarType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indication of whether the end of a piece of bar stock being feed by a
        bar feeder has been reached.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='EquipmentModeValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for EquipmentMode
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ON'>
        <xs:annotation>
          <xs:documentation>
            On state or value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OFF'>
        <xs:annotation>
          <xs:documentation>
            Off state or value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='EquipmentModeType'>
    <xs:annotation>
      <xs:documentation>
        An indication that a piece of equipment, or a sub-part of a piece of
        equipment, is performing specific types of activities.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='EquipmentModeValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='EquipmentMode' type='EquipmentModeType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indication that a piece of equipment, or a sub-part of a piece of
        equipment, is performing specific types of activities.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='ExecutionValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for Execution
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='READY'>
        <xs:annotation>
          <xs:documentation>
            A component is ready to engage.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INTERRUPTED'>
        <xs:annotation>
          <xs:documentation>
            The action of a component has been suspended due to an external
            signal.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FEED_HOLD'>
        <xs:annotation>
          <xs:documentation>
            Motion of a component has been commanded to stop at its current
            position.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='STOPPED'>
        <xs:annotation>
          <xs:documentation>
            The component is stopped.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OPTIONAL_STOP'>
        <xs:annotation>
          <xs:documentation>
            The controllers program has been intentionally stopped
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_STOPPED'>
        <xs:annotation>
          <xs:documentation>
            The execution of the controller&apos;s program has been stopped by a
            command from within the program.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROGRAM_COMPLETED'>
        <xs:annotation>
          <xs:documentation>
            The execution of the controllers program has been stopped by a
            command from within the program.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ExecutionType'>
    <xs:annotation>
      <xs:documentation>
        The execution status of the controller.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='ExecutionValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Execution' type='ExecutionType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        The execution status of the controller.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='FunctionalModeValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for FunctionalMode
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='PRODUCTION'>
        <xs:annotation>
          <xs:documentation>
            A structural element is currently producing product.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SETUP'>
        <xs:annotation>
          <xs:documentation>
            A structural element is being prepared or modified to begin
            production of product.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='TEARDOWN'>
        <xs:annotation>
          <xs:documentation>
            Typically, a structural element has completed the production of a
            product and is being modified or returned to a neutral state such
            that it may then be prepared to begin production of a different
            product.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MAINTENANCE'>
        <xs:annotation>
          <xs:documentation>
            Action related to maintenance on the piece of equipment.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='PROCESS_DEVELOPMENT'>
        <xs:annotation>
          <xs:documentation>
            A structural element is being used to prove-out a new process.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='FunctionalModeType'>
    <xs:annotation>
      <xs:documentation>
        The current intended production status of the device or component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='FunctionalModeValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='FunctionalMode' type='FunctionalModeType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        The current intended production status of the device or component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='HardnessType'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the hardness of a material.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='FloatEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Hardness' type='HardnessType' substitutionGroup='FloatEvent'>
    <xs:annotation>
      <xs:documentation>
        The measurement of the hardness of a material.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='InterfaceStateValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for InterfaceState
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ENABLED'>
        <xs:annotation>
          <xs:documentation>
            A component is currently operational and performing as expected.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DISABLED'>
        <xs:annotation>
          <xs:documentation>
            A component is currently not operational.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='InterfaceStateType'>
    <xs:annotation>
      <xs:documentation>
        An indication of the operational state of an interface component
        component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='InterfaceStateValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='InterfaceState' type='InterfaceStateType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indication of the operational state of an interface component
        component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LineType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.4.0.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Line' type='LineType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.4.0.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LineLabelType'>
    <xs:annotation>
      <xs:documentation>
        An optional identifier for a block event of code in a program event.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='LineLabel' type='LineLabelType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        An optional identifier for a block event of code in a program event.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='LineNumberType'>
    <xs:annotation>
      <xs:documentation>
        A reference to the position of a block of program code within a control
        program.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='IntegerEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='LineNumber' type='LineNumberType' substitutionGroup='IntegerEvent'>
    <xs:annotation>
      <xs:documentation>
        A reference to the position of a block of program code within a control
        program.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MaterialType'>
    <xs:annotation>
      <xs:documentation>
        The identifier of a material used or consumed in the manufacturing
        process.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Material' type='MaterialType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The identifier of a material used or consumed in the manufacturing
        process.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MessageType'>
    <xs:annotation>
      <xs:documentation>
        Any text string of information to be transferred from a piece of
        equipment to a client software application.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Message' type='MessageType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Any text string of information to be transferred from a piece of
        equipment to a client software application.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='OperatorIdType'>
    <xs:annotation>
      <xs:documentation>
        The identifier of the person currently responsible for operating the
        piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='OperatorId' type='OperatorIdType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The identifier of the person currently responsible for operating the
        piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PalletIdType'>
    <xs:annotation>
      <xs:documentation>
        The identifier for a pallet.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PalletId' type='PalletIdType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The identifier for a pallet.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PartCountType'>
    <xs:annotation>
      <xs:documentation>
        The count of parts produced.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='FloatEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PartCount' type='PartCountType' substitutionGroup='FloatEvent'>
    <xs:annotation>
      <xs:documentation>
        The count of parts produced.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PartIdType'>
    <xs:annotation>
      <xs:documentation>
        An identifier of a part in a manufacturing operation.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PartId' type='PartIdType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        An identifier of a part in a manufacturing operation.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PartNumberType'>
    <xs:annotation>
      <xs:documentation>
        An identifier of a part or product moving through the manufacturing
        process. The valid data value must be a text string. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PartNumber' type='PartNumberType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        An identifier of a part or product moving through the manufacturing
        process. The valid data value must be a text string. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PathFeedrateOverrideType'>
    <xs:annotation>
      <xs:documentation>
        The value of a signal or calculation issued to adjust the feedrate for
        the axes associated with a path component that may represent a single
        axis or the coordinated movement of multiple axes.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='FloatEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PathFeedrateOverride' type='PathFeedrateOverrideType' substitutionGroup='FloatEvent'>
    <xs:annotation>
      <xs:documentation>
        The value of a signal or calculation issued to adjust the feedrate for
        the axes associated with a path component that may represent a single
        axis or the coordinated movement of multiple axes.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='PathModeValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for PathMode
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='INDEPENDENT'>
        <xs:annotation>
          <xs:documentation>
            The path is operating independently and without the influence of
            another path.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MASTER'>
        <xs:annotation>
          <xs:documentation>
            It provides information or state values that influences the
            operation of other dataitem of similar type.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='SYNCHRONOUS'>
        <xs:annotation>
          <xs:documentation>
            Physical or logical parts which are not physically connected to each
            other but are operating together.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MIRROR'>
        <xs:annotation>
          <xs:documentation>
            The axes associated with the path are mirroring the motion of the
            master value path.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='PathModeType'>
    <xs:annotation>
      <xs:documentation>
        Describes the operational relationship between a path structural element
        and another path structural element for pieces of equipment comprised of
        multiple logical groupings of controlled axes or other logical
        operations.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='PathModeValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PathMode' type='PathModeType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        Describes the operational relationship between a path structural element
        and another path structural element for pieces of equipment comprised of
        multiple logical groupings of controlled axes or other logical
        operations.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='PowerStateValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for PowerState
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ON'>
        <xs:annotation>
          <xs:documentation>
            On state or value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OFF'>
        <xs:annotation>
          <xs:documentation>
            Off state or value.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='PowerStateType'>
    <xs:annotation>
      <xs:documentation>
        The indication of the status of the source of energy for a structural
        element to allow it to perform its intended function or the state of an
        enabling signal providing permission for the structural element to
        perform its functions.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='PowerStateValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PowerState' type='PowerStateType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        The indication of the status of the source of energy for a structural
        element to allow it to perform its intended function or the state of an
        enabling signal providing permission for the structural element to
        perform its functions.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PowerStatusType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.1.0.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PowerStatus' type='PowerStatusType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED in Version 1.1.0.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProgramType'>
    <xs:annotation>
      <xs:documentation>
        The name of the logic or motion program being executed by the controller
        component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Program' type='ProgramType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The name of the logic or motion program being executed by the controller
        component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProgramCommentType'>
    <xs:annotation>
      <xs:documentation>
        A comment or non-executable statement in the control program. The valid
        data value must be a text string.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProgramComment' type='ProgramCommentType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        A comment or non-executable statement in the control program. The valid
        data value must be a text string.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='ProgramEditValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for ProgramEdit
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='READY'>
        <xs:annotation>
          <xs:documentation>
            A component is ready to engage.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='NOT_READY'>
        <xs:annotation>
          <xs:documentation>
            A component is not ready to engage.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ProgramEditType'>
    <xs:annotation>
      <xs:documentation>
        An indication of the status of the controller components program editing
        mode. On many controls, a program can be edited while another program is
        currently being executed.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='ProgramEditValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProgramEdit' type='ProgramEditType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indication of the status of the controller components program editing
        mode. On many controls, a program can be edited while another program is
        currently being executed.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProgramEditNameType'>
    <xs:annotation>
      <xs:documentation>
        The name of the program being edited. This is used in conjunction with
        programedit event when in active value state. The valid data value must
        be a text string.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProgramEditName' type='ProgramEditNameType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The name of the program being edited. This is used in conjunction with
        programedit event when in active value state. The valid data value must
        be a text string.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProgramHeaderType'>
    <xs:annotation>
      <xs:documentation>
        The non-executable header section of the control program.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProgramHeader' type='ProgramHeaderType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The non-executable header section of the control program.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='RotaryModeValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for RotaryMode
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='SPINDLE'>
        <xs:annotation>
          <xs:documentation>
            The axis is functioning as a spindle.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INDEX'>
        <xs:annotation>
          <xs:documentation>
            The axis is configured to index.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CONTOUR'>
        <xs:annotation>
          <xs:documentation>
            The position of the axis is being interpolated.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='RotaryModeType'>
    <xs:annotation>
      <xs:documentation>
        The current operating mode for a rotary type axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='RotaryModeValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='RotaryMode' type='RotaryModeType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        The current operating mode for a rotary type axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='RotaryVelocityOverrideType'>
    <xs:annotation>
      <xs:documentation>
        The value of a command issued to adjust the programmed velocity for a
        rotary type axis. This command represents a percentage change to the
        velocity calculated by a logic or motion program or set by a switch for
        a rotary type axis.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='FloatEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='RotaryVelocityOverride' type='RotaryVelocityOverrideType' substitutionGroup='FloatEvent'>
    <xs:annotation>
      <xs:documentation>
        The value of a command issued to adjust the programmed velocity for a
        rotary type axis. This command represents a percentage change to the
        velocity calculated by a logic or motion program or set by a switch for
        a rotary type axis.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='SerialNumberType'>
    <xs:annotation>
      <xs:documentation>
        The serial number associated with a piece of equipment. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='SerialNumber' type='SerialNumberType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The serial number associated with a piece of equipment. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='SpindleInterlockValueType'>
    <xs:annotation>
      <xs:documentation>
        Controlled vocabulary for SpindleInterlock
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The value of the data entity that is not engaging.
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            Value is indeterminate
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='SpindleInterlockType'>
    <xs:annotation>
      <xs:documentation>
        An indication of the status of the spindle for a piece of equipment when
        power has been removed and it is free to rotate.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='SpindleInterlockValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='SpindleInterlock' type='SpindleInterlockType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An indication of the status of the spindle for a piece of equipment when
        power has been removed and it is free to rotate.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ToolAssetIdType'>
    <xs:annotation>
      <xs:documentation>
        The identifier of an individual tool asset.The valid data value must be
        a text string.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ToolAssetId' type='ToolAssetIdType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The identifier of an individual tool asset.The valid data value must be
        a text string.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ToolIdType'>
    <xs:annotation>
      <xs:documentation>
        The identifier for a class of Cutting Tools. This is defined as an XML
        string type and is implementation dependent. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ToolId' type='ToolIdType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The identifier for a class of Cutting Tools. This is defined as an XML
        string type and is implementation dependent. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ToolNumberType'>
    <xs:annotation>
      <xs:documentation>
        The identifier assigned by the controller component to a cutting tool
        when in use by a piece of equipment. The valid data value must be a text
        string.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ToolNumber' type='ToolNumberType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The identifier assigned by the controller component to a cutting tool
        when in use by a piece of equipment. The valid data value must be a text
        string.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ToolOffsetType'>
    <xs:annotation>
      <xs:documentation>
        A reference to the tool offset variables applied to the active cutting
        tool associated with a path in a controller type component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ToolOffset' type='ToolOffsetType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        A reference to the tool offset variables applied to the active cutting
        tool associated with a path in a controller type component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='UserType'>
    <xs:annotation>
      <xs:documentation>
        The identifier of the person currently responsible for operating the
        piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='User' type='UserType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The identifier of the person currently responsible for operating the
        piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='WireType'>
    <xs:annotation>
      <xs:documentation>
        A string like piece or filament of relatively rigid or flexible material
        provided in a variety of diameters.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Wire' type='WireType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        A string like piece or filament of relatively rigid or flexible material
        provided in a variety of diameters.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='WorkOffsetType'>
    <xs:annotation>
      <xs:documentation>
        A reference to the offset variables for a work piece or part associated
        with a path in a controller type component.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='WorkOffset' type='WorkOffsetType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        A reference to the offset variables for a work piece or part associated
        with a path in a controller type component.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='WorkholdingIdType'>
    <xs:annotation>
      <xs:documentation>
        The identifier for the current workholding or part clamp in use by a
        piece of equipment. The valid data value must be a text string.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='WorkholdingId' type='WorkholdingIdType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The identifier for the current workholding or part clamp in use by a
        piece of equipment. The valid data value must be a text string.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AssetChangedType'>
    <xs:annotation>
      <xs:documentation>
        The value of the cdata for the event MUST be the assetid of the asset
        that has been added or changed. There will not be a separate message for
        new assets.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'>
        <xs:attribute name='assetType' type='AssetAttrTypeType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              The type of asset that was updated.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AssetChanged' type='AssetChangedType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The value of the cdata for the event MUST be the assetid of the asset
        that has been added or changed. There will not be a separate message for
        new assets.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='AssetRemovedType'>
    <xs:annotation>
      <xs:documentation>
        The value of the cdata for the event MUST be the assetid of the asset
        that has been removed. The asset will still be visible if requested with
        the includeremoved parameter as described in the protocol section. When
        assets are removed they are not moved to the beginning of the most
        recently modified list. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'>
        <xs:attribute name='assetType' type='AssetAttrTypeType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              The type of asset that was updated.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='AssetRemoved' type='AssetRemovedType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The value of the cdata for the event MUST be the assetid of the asset
        that has been removed. The asset will still be visible if requested with
        the includeremoved parameter as described in the protocol section. When
        assets are removed they are not moved to the beginning of the most
        recently modified list. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='OpenDoorType'>
    <xs:annotation>
      <xs:documentation>
        Service to open a door. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='OpenDoor' type='OpenDoorType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to open a door. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CloseDoorType'>
    <xs:annotation>
      <xs:documentation>
        Service to close a door.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CloseDoor' type='CloseDoorType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to close a door.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='OpenChuckType'>
    <xs:annotation>
      <xs:documentation>
        Service to open a chuck. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='OpenChuck' type='OpenChuckType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to open a chuck. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='CloseChuckType'>
    <xs:annotation>
      <xs:documentation>
        Service to close a chuck.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='CloseChuck' type='CloseChuckType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to close a chuck.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MaterialFeedType'>
    <xs:annotation>
      <xs:documentation>
        Service to advance material or feed product to a piece of equipment from
        a continuous or bulk source. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='MaterialFeed' type='MaterialFeedType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to advance material or feed product to a piece of equipment from
        a continuous or bulk source. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MaterialChangeType'>
    <xs:annotation>
      <xs:documentation>
        Service to change the type of material or product being loaded or fed to
        a piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='MaterialChange' type='MaterialChangeType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to change the type of material or product being loaded or fed to
        a piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MaterialRetractType'>
    <xs:annotation>
      <xs:documentation>
        Service to remove or retract material or product.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='MaterialRetract' type='MaterialRetractType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to remove or retract material or product.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PartChangeType'>
    <xs:annotation>
      <xs:documentation>
        Service to change the part or product associated with a piece of
        equipment to a different part or product. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PartChange' type='PartChangeType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to change the part or product associated with a piece of
        equipment to a different part or product. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MaterialLoadType'>
    <xs:annotation>
      <xs:documentation>
        Service to load a piece of material or product.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='MaterialLoad' type='MaterialLoadType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to load a piece of material or product.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MaterialUnloadType'>
    <xs:annotation>
      <xs:documentation>
        Service to unload a piece of material or product.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='MaterialUnload' type='MaterialUnloadType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Service to unload a piece of material or product.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProcessTimeType'>
    <xs:annotation>
      <xs:documentation>
        The time and date associated with an activity or event. processtime
        event MUST be reported in ISO 8601 format.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProcessTime' type='ProcessTimeType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The time and date associated with an activity or event. processtime
        event MUST be reported in ISO 8601 format.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DateCodeType'>
    <xs:annotation>
      <xs:documentation>
        The time and date code associated with a material or other physical
        item. datecode event MUST be reported in ISO 8601 format.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DateCode' type='DateCodeType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The time and date code associated with a material or other physical
        item. datecode event MUST be reported in ISO 8601 format.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MaterialLayerType'>
    <xs:annotation>
      <xs:documentation>
        Identifies the layers of material applied to a part or product as part
        of an additive manufacturing process. The valid data value MUST be an
        integer.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='MaterialLayer' type='MaterialLayerType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Identifies the layers of material applied to a part or product as part
        of an additive manufacturing process. The valid data value MUST be an
        integer.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='WaitStateType'>
    <xs:annotation>
      <xs:documentation>
        An indication of the reason that execution event is reporting a value of
        wait. The valid data value MUST be poweringup, poweringdown, partload,
        partunload, toolload, toolunload, materialload event, materialunload
        event, secondaryprocess, pausing, or resuming.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='WaitState' type='WaitStateType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        An indication of the reason that execution event is reporting a value of
        wait. The valid data value MUST be poweringup, poweringdown, partload,
        partunload, toolload, toolunload, materialload event, materialunload
        event, secondaryprocess, pausing, or resuming.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PartDetectType'>
    <xs:annotation>
      <xs:documentation>
        An indication designating whether a part or work piece has been detected
        or is present. The valid data value MUST be present or notpresent.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PartDetect' type='PartDetectType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        An indication designating whether a part or work piece has been detected
        or is present. The valid data value MUST be present or notpresent.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='DeviceUuidType'>
    <xs:annotation>
      <xs:documentation>
        The piece of equipments UUID that supplied this data. This is an
        optional element references to the UUID attribute given in the device
        element. This can be any series of numbers and letters as defined by the
        XML type nmtoken.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='DeviceUuid' type='DeviceUuidType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The piece of equipments UUID that supplied this data. This is an
        optional element references to the UUID attribute given in the device
        element. This can be any series of numbers and letters as defined by the
        XML type nmtoken.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProgramNestLevelType'>
    <xs:annotation>
      <xs:documentation>
        An indication of the nesting level within a control program that is
        associated with the code or instructions that is currently being
        executed. If an Initial Value is not defined, the nesting level
        associated with the highest or initial nesting level of the program MUST
        default to zero (0). The value reported for programnestlevel event MUST
        be an integer.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProgramNestLevel' type='ProgramNestLevelType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        An indication of the nesting level within a control program that is
        associated with the code or instructions that is currently being
        executed. If an Initial Value is not defined, the nesting level
        associated with the highest or initial nesting level of the program MUST
        default to zero (0). The value reported for programnestlevel event MUST
        be an integer.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProgramLocationTypeType'>
    <xs:annotation>
      <xs:documentation>
        Defines whether the logic or motion program defined by program event is
        being executed from the local memory of the controller or from an
        outside source. The valid data value MUST be local or external.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProgramLocationType' type='ProgramLocationTypeType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        Defines whether the logic or motion program defined by program event is
        being executed from the local memory of the controller or from an
        outside source. The valid data value MUST be local or external.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ProgramLocationType'>
    <xs:annotation>
      <xs:documentation>
        The Uniform Resource Identifier (URI) for the source file associated
        with program event.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ProgramLocation' type='ProgramLocationType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        The Uniform Resource Identifier (URI) for the source file associated
        with program event.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ToolGroupType'>
    <xs:annotation>
      <xs:documentation>
        An identifier for the tool group associated with a specific tool.
        Commonly used to designate spare tools.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ToolGroup' type='ToolGroupType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        An identifier for the tool group associated with a specific tool.
        Commonly used to designate spare tools.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VariableType'>
    <xs:annotation>
      <xs:documentation>
         A data value whose meaning may change over time due to changes in the
        opertion of a piece of equipment or the process being executed on that
        piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Variable' type='VariableType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
         A data value whose meaning may change over time due to changes in the
        opertion of a piece of equipment or the process being executed on that
        piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PartCountDiscreteType'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The count of parts produced.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='PartCountType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PartCountDiscrete' type='PartCountDiscreteType' substitutionGroup='PartCount'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The count of parts produced.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ToolIdDiscreteType'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The identifier for a class of Cutting Tools. This is defined
        as an XML string type and is implementation dependent. 
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ToolIdType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ToolIdDiscrete' type='ToolIdDiscreteType' substitutionGroup='ToolId'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The identifier for a class of Cutting Tools. This is defined
        as an XML string type and is implementation dependent. 
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ToolNumberDiscreteType'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The identifier assigned by the controller component to a
        cutting tool when in use by a piece of equipment. The valid data value
        must be a text string.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ToolNumberType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ToolNumberDiscrete' type='ToolNumberDiscreteType' substitutionGroup='ToolNumber'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The identifier assigned by the controller component to a
        cutting tool when in use by a piece of equipment. The valid data value
        must be a text string.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='ToolAssetIdDiscreteType'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The identifier of an individual tool asset.The valid data
        value must be a text string.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ToolAssetIdType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='ToolAssetIdDiscrete' type='ToolAssetIdDiscreteType' substitutionGroup='ToolAssetId'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The identifier of an individual tool asset.The valid data
        value must be a text string.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='PalletIdDiscreteType'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The identifier for a pallet.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='PalletIdType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='PalletIdDiscrete' type='PalletIdDiscreteType' substitutionGroup='PalletId'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The identifier for a pallet.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='MessageDiscreteType'>
    <xs:annotation>
      <xs:documentation>
        Discrete of Any text string of information to be transferred from a
        piece of equipment to a client software application.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='MessageType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='MessageDiscrete' type='MessageDiscreteType' substitutionGroup='Message'>
    <xs:annotation>
      <xs:documentation>
        Discrete of Any text string of information to be transferred from a
        piece of equipment to a client software application.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='BlockDiscreteType'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The line of code or command being executed by a controller
        structural element.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='BlockType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='BlockDiscrete' type='BlockDiscreteType' substitutionGroup='Block'>
    <xs:annotation>
      <xs:documentation>
        Discrete of The line of code or command being executed by a controller
        structural element.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='KeyType'>
    <xs:annotation>
      <xs:documentation>
        The key for adata set
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:NMTOKEN'/>
  </xs:simpleType>
  <xs:complexType name='EntryType' abstract='true' mixed='true'>
    <xs:annotation>
      <xs:documentation>
        An XML element representing a key-value pair published as part of a data
        set.
      </xs:documentation>
    </xs:annotation>
    <xs:attribute name='key' type='KeyType' use='required'>
      <xs:annotation>
        <xs:documentation>
          they key
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name='removed' type='RemovedType' use='optional'>
      <xs:annotation>
        <xs:documentation>
          An indicator that the mtconnect asset has been removed from the piece
          of equipment.
        </xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  <xs:element abstract='true' name='Entry' type='EntryType'>
    <xs:annotation>
      <xs:documentation>
        An XML element representing a key-value pair published as part of a data
        set.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VariableEntryType'>
    <xs:annotation>
      <xs:documentation>
        DataSet of A data value whose meaning may change over time due to
        changes in the opertion of a piece of equipment or the process being
        executed on that piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EntryType'>
        <xs:simpleType>
          <xs:restriction base='StringEventValueType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='VariableEntry' type='VariableEntryType' substitutionGroup='Entry'>
    <xs:annotation>
      <xs:documentation>
        DataSet of A data value whose meaning may change over time due to
        changes in the opertion of a piece of equipment or the process being
        executed on that piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='VariableDataSetType' mixed='true'>
    <xs:annotation>
      <xs:documentation>
        DataSet of A data value whose meaning may change over time due to
        changes in the opertion of a piece of equipment or the process being
        executed on that piece of equipment.
      </xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base='EventType'>
        <xs:sequence>
          <xs:element name='Entry' type='VariableEntryType' minOccurs='0' maxOccurs='unbounded'>
            <xs:annotation>
              <xs:documentation>
                An XML element representing a key-value pair published as part
                of a data set.
              </xs:documentation>
            </xs:annotation>
          </xs:element>
        </xs:sequence>
        <xs:attribute name='count' type='CountValueType' use='required'>
          <xs:annotation>
            <xs:documentation>
              A count of something.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:element name='VariableDataSet' type='VariableDataSetType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        DataSet of A data value whose meaning may change over time due to
        changes in the opertion of a piece of equipment or the process being
        executed on that piece of equipment.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='ConditionDescriptionType'>
    <xs:annotation>
      <xs:documentation>
        The description of the Condition
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='NativeSeverityType'>
    <xs:annotation>
      <xs:documentation>
        The device&apos;s severity
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='QualifierType'>
    <xs:annotation>
      <xs:documentation>
        qualifier provides additional information regarding a fault state
        associated with the measured value of a process variable.
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='HIGH'>
        <xs:annotation>
          <xs:documentation>
            The value is too high
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='LOW'>
        <xs:annotation>
          <xs:documentation>
            The value is too low
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='ConditionType' abstract='true'>
    <xs:annotation>
      <xs:documentation>
        An XML element which provides the information and data reported from a
        piece of equipment for those dataitem elements defined with a category
        attribute of condition category in the mtconnectdevices document.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ConditionDescriptionType'>
        <xs:attributeGroup ref='ObservationType'/>
        <xs:attribute name='type' type='DataItemEnumType' use='required'>
          <xs:annotation>
            <xs:documentation>
              The type of either a structural element or a dataitem being
              measured.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='nativeCode' type='NativeCodeType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              The native code (usually an alpha-numeric value) generated by the
              controller of a piece of equipment or the element.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='nativeSeverity' type='NativeSeverityType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              If the piece of equipment designates a severity level to a fault,
              nativeseverity reports that severity information to a client
              software application. 
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='qualifier' type='QualifierType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              qualifier provides additional information regarding a fault state
              associated with the measured value of a process variable.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='statistic' type='DataItemStatisticsType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              Describes the type of statistical calculation performed on a
              series of data samples to provide the reported data value.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element abstract='true' name='Condition' type='ConditionType'>
    <xs:annotation>
      <xs:documentation>
        An XML element which provides the information and data reported from a
        piece of equipment for those dataitem elements defined with a category
        attribute of condition category in the mtconnectdevices document.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='UnavailableType'>
    <xs:annotation>
      <xs:documentation>
        The conditon can not be determined.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ConditionType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Unavailable' type='UnavailableType' substitutionGroup='Condition'>
    <xs:annotation>
      <xs:documentation>
        The conditon can not be determined.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='NormalType'>
    <xs:annotation>
      <xs:documentation>
        Normal value for a condition element.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ConditionType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Normal' type='NormalType' substitutionGroup='Condition'>
    <xs:annotation>
      <xs:documentation>
        Normal value for a condition element.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='WarningType'>
    <xs:annotation>
      <xs:documentation>
        Warning value for a condition element.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ConditionType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Warning' type='WarningType' substitutionGroup='Condition'>
    <xs:annotation>
      <xs:documentation>
        Warning value for a condition element.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name='FaultType'>
    <xs:annotation>
      <xs:documentation>
        Fault value for a condition element.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='ConditionType'/>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Fault' type='FaultType' substitutionGroup='Condition'>
    <xs:annotation>
      <xs:documentation>
        Fault value for a condition element.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='NativeNotifcationCodeType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED: An Notifcation code as defined by the component
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'/>
  </xs:simpleType>
  <xs:simpleType name='NotifcationCodeType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED: Types of Notifcations
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='FAILURE'>
        <xs:annotation>
          <xs:documentation>
            A failure
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FAULT'>
        <xs:annotation>
          <xs:documentation>
            A fault occurred
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CRASH'>
        <xs:annotation>
          <xs:documentation>
            A spindle crash
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='JAM'>
        <xs:annotation>
          <xs:documentation>
            A component has jammed
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OVERLOAD'>
        <xs:annotation>
          <xs:documentation>
            The component has been overloaded
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ESTOP'>
        <xs:annotation>
          <xs:documentation>
            E-Stop was pushed
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MATERIAL'>
        <xs:annotation>
          <xs:documentation>
            A material failure has occurred
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='MESSAGE'>
        <xs:annotation>
          <xs:documentation>
            An operators message. Used with INFO severity
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='OTHER'>
        <xs:annotation>
          <xs:documentation>
            Another Notifcation type
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='AlarmStateType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED: The active or cleared state of the notification
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='ACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The notification is active
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='CLEARED'>
        <xs:annotation>
          <xs:documentation>
            The notification has been cleared
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:simpleType name='SeverityType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED: The severity of the notification
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='CRITICAL'>
        <xs:annotation>
          <xs:documentation>
            The notification is critical
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ERROR'>
        <xs:annotation>
          <xs:documentation>
            An error has occurred
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='WARNING'>
        <xs:annotation>
          <xs:documentation>
            A medium level notification that should be observed
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='INFORMATION'>
        <xs:annotation>
          <xs:documentation>
            This notification is for information purposes only
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='AlarmType'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED: Replaced with condition category category data items in
        Version 1.1.0.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base='StringEventType'>
        <xs:attribute name='code' type='NotifcationCodeType' use='required'>
          <xs:annotation>
            <xs:documentation>
              The Notifcation type
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='severity' type='SeverityType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              The severity
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='state' type='AlarmStateType' use='optional'>
          <xs:annotation>
            <xs:documentation>
              The state
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name='nativeCode' type='NativeNotifcationCodeType' use='required'>
          <xs:annotation>
            <xs:documentation>
              The native code (usually an alpha-numeric value) generated by the
              controller of a piece of equipment or the element.
            </xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name='Alarm' type='AlarmType' substitutionGroup='StringEvent'>
    <xs:annotation>
      <xs:documentation>
        DEPRECATED: Replaced with condition category category data items in
        Version 1.1.0.
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='InterfaceEventValuesType'>
    <xs:annotation>
      <xs:documentation>
        The possible values for an interface event
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            The value is unavailable
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='NOT_READY'>
        <xs:annotation>
          <xs:documentation>
            The interface is not ready
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='READY'>
        <xs:annotation>
          <xs:documentation>
            The interface is ready
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ACTIVE'>
        <xs:annotation>
          <xs:documentation>
            The interface is actively executing
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='COMPLETE'>
        <xs:annotation>
          <xs:documentation>
            The interface has completed the action
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='FAIL'>
        <xs:annotation>
          <xs:documentation>
            The interface action has failed
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name='InterfaceEventType' abstract='true'>
    <xs:annotation>
      <xs:documentation>
        An abstract interface event
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:restriction base='EventType'>
        <xs:simpleType>
          <xs:restriction base='InterfaceEventValuesType'/>
        </xs:simpleType>
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element abstract='true' name='InterfaceEvent' type='InterfaceEventType' substitutionGroup='Event'>
    <xs:annotation>
      <xs:documentation>
        An abstract interface event
      </xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:simpleType name='InterfaceStatesType'>
    <xs:annotation>
      <xs:documentation>
        The state of the interface
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base='xs:string'>
      <xs:enumeration value='UNAVAILABLE'>
        <xs:annotation>
          <xs:documentation>
            The value is unavailable
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='ENABLED'>
        <xs:annotation>
          <xs:documentation>
            The interface is enabled
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value='DISABLED'>
        <xs:annotation>
          <xs:documentation>
            The interface is disabled
          </xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
</xs:schema>