STA V2.0 Design Draft

[humaidkidwai]

I designed a draft data model that addresses some of the concerns the community has had over the past couple of years and also attempts to align with OMS V3.

ObservationCollection
In TC Singapore, perhaps this was debated as to whether or not is it really a collection of observations or just a Datastream renamed to ObservationCollection.
[1] As per OMS, an ObservationCollection should be homogeneous or summarizing type.
[2] Should ObservationCollection be allowed to contain different types of observations that may potentially violate the OBSC req set out by OMS? Will it help in addressing issues?
[3] resultType is adopted as per SWE Common JSON schema (see #122 )

Deployment
This entity describes the current state of observers (read Sensors) in their association with Host (Thing (?))
[1] position property may be used to describe geographic location of sensors for moving things?

ObservingProcedure
See #160
Do we need it?

FeatureOfInterest
In order to introduce sampling in STA, FoI can be specialized further to pFOI and uFOI as specified in OMS. This also allows to extend pFOI by introducing and linking Sampling entitites with it. pFOI may act as a Sample proxy in the design

Please feel free to critique and put forward your suggestions

[hylkevds]

Core Model:

OM Extension

Adds Deployment and ObservingProcedure

Sampling Data Model:

Relations Data Model:

Tasking Data Model:

Tasking Data Model, illustrating the mirroring of Tasking and Sensing:

[humaidkidwai]

resultTime::Observation, time::PreparationStep needs to be of type TM_Instant. As described in #177 the way OData defines it is DateTimeOffset, this should be elaborated in the OData binding section of the standard and not in the data model.

[hylkevds]

I fixed the image.

[humaidkidwai]

Is the Deployment entity to be included in the Core Sensing Part of the document?

[hylkevds]

Updated images:
observationType --> resultType
deploymentTime --> time
samplingTime --> time
samplingLocation --> location
Sampling/parameters --> properties
Sampling/location type --> ANY

[hylkevds]

Changed Sampling -> Thing relation cardinality to 0..1.
There is no need to require a Thing/Host for a Sampling, since the domain relation SampledFeature is mandatory.