Problems with some attributes in dcm4chee

[kay535]

I have created a patient and MWL using dcm4chee. In the user interface of dcm4chee, all of these attributes have values, including 'ScheduledStationAETitle', 'ScheduledProcedureStepStartDate', 'ScheduledProcedureStepStartTime', and 'ScheduledProcedureStepID'. However, when searching through the C-Find message, these attributes appear null. Can you tell me what the problem is?
Thanks for your help.

Data in the dcm4chee user interface：

Data queried by C-Find message:

C-Find message:

2023-12-29 15:28:20,017 INFO  [org.dcm4che3.net.Connection] (EE-ManagedExecutorService-default-Thread-2) Accept connection Socket[addr=/192.168.2.106,port=54867,localport=11112]
2023-12-29 15:28:20,051 INFO  [org.dcm4che3.net.Association] (EE-ManagedExecutorService-default-Thread-577) DCM4CHEE<-AE(322) >> A-ASSOCIATE-RQ
2023-12-29 15:28:20,051 INFO  [org.dcm4che3.net.Association] (EE-ManagedExecutorService-default-Thread-577) DCM4CHEE<-AE(322) << A-ASSOCIATE-AC
2023-12-29 15:28:20,110 INFO  [org.dcm4che3.net.Dimse] (EE-ManagedExecutorService-default-Thread-577) DCM4CHEE<-AE(322) >> 1:C-FIND-RQ[pcid=1, prior=0
  cuid=1.2.840.10008.5.1.4.31 - Modality Worklist Information Model - FIND
  tsuid=1.2.840.10008.1.2 - Implicit VR Little Endian
2023-12-29 15:28:20,110 INFO  [org.dcm4chee.arc.procedure.scp.MWLCFindSCP] (EE-ManagedExecutorService-default-Thread-577) DCM4CHEE<-AE(322): Process MWL C-FIND RQ:
(0008,0005) CS [] SpecificCharacterSet
(0008,0050) SH [] AccessionNumber
(0008,0052) CS [Patient] QueryRetrieveLevel
(0008,0060) CS [] Modality
(0008,0061) CS [] ModalitiesInStudy
(0008,0090) PN [] ReferringPhysicianName
(0008,1050) PN [] PerformingPhysicianName
(0010,0010) PN [] PatientName
(0010,0020) LO [500067] PatientID
(0010,0030) DA [] PatientBirthDate
(0010,0040) CS [] PatientSex
(0010,1030) DS [] PatientWeight
(0010,2000) LO [] MedicalAlerts
(0010,2110) LO [] Allergies
(0010,21C0) US [] PregnancyStatus
(0020,000D) UI [] StudyInstanceUID
(0032,1032) PN [] RequestingPhysician
(0032,1070) LO [] RequestedContrastAgent
(0038,0010) LO [] AdmissionID
(0038,0050) LO [] SpecialNeeds
(0038,0300) LO [] CurrentPatientLocation
(0038,0500) LO [] PatientState
(0040,0001) AE [] ScheduledStationAETitle
(0040,0002) DA [] ScheduledProcedureStepStartDate
(0040,0003) TM [] ScheduledProcedureStepStartTime
(0040,0009) SH [] ScheduledProcedureStepID
(0040,0010) SH [] ScheduledStationName
(0040,0011) SH [] ScheduledProcedureStepLocation
(0040,0012) LO [] PreMedication
(0040,1001) SH [] RequestedProcedureID
(0040,1003) SH [] RequestedProcedurePriority
(0040,1004) LO [] PatientTransportArrangements
(0040,1008) LO [] ConfidentialityCode

2023-12-29 15:28:20,125 INFO  [org.dcm4che3.net.Dimse] (EE-ManagedExecutorService-default-Thread-578) DCM4CHEE<-AE(322) << 1:C-FIND-RSP[pcid=1, status=ff00H
  cuid=1.2.840.10008.5.1.4.31 - Modality Worklist Information Model - FIND
  tsuid=1.2.840.10008.1.2 - Implicit VR Little Endian

[gunterze]

(0040,0001) AE [] ScheduledStationAETitle
(0040,0002) DA [] ScheduledProcedureStepStartDate
(0040,0003) TM [] ScheduledProcedureStepStartTime
(0040,0009) SH [] ScheduledProcedureStepID
(0040,0010) SH [] ScheduledStationName
(0040,0011) SH [] ScheduledProcedureStepLocation
(0040,0012) LO [] PreMedication

are attributes of the single nested item of the Scheduled Procedure Step Sequence (0040,0100), and not of the root Dataset of MWL items and have therefore be requested according DICOM PS 3.4, C.2.2.2.6 Sequence Matching.

Also, in opposite to the identifier of the C-FIND request of the Composite Query/Retrieve Services, the identifier of the C-FIND request of the Basic Worklist Management Service shall not include Query Retrieve Level (0008,0052) .

Therefore

(0008,0052) CS [Patient] QueryRetrieveLevel

is not compliant with DICOM PS 3.4, K.6.1 Modality Worklist SOP Class.