In the Composite Instance Root Retrieve Only Information Model, the information is arranged into two levels that correspond to one of the two values in element (0008,0052) shown in Table Y.6.1-1.
Note
The use of the word "IMAGE" rather than "Composite Instance" is historical to allow backward compatibility with previous editions of the Standard. It should not be taken to mean that Composite Instances of other than image type are not included at the level indicated by the value IMAGE.
The Composite Instance Root Retrieve Only Information Model may be represented by the entity relationship diagram shown in Figure Y.6-1
Table Y.6-1 defines the keys at the Composite Instance level of the Composite Instance Root Query/Retrieve Information model.
Table Y.6-1. Composite Instance Level Keys for the Composite Instance Root Retrieve Information Model
Table Y.6-2 defines the keys at the Frame level of the Composite Instance Root Query/Retrieve Information Model. One and only one of the frame level keys listed in Table Y.6-2 shall be present in a FRAME level request
Table Y.6-2. Frame Level Keys for the Composite Instance Root Retrieve Information Model
A C-MOVE or C-GET request may be performed to any level of the Query/Retrieve Model. A C-MOVE or C-GET where the Query/Retrieve level is the:
IMAGE level indicates that selected individual Composite Instances shall be transferred
FRAME level indicates that a single new Composite Instance shall be created and transferred
An implementation may conform to one of the Composite Instance Root Retrieve SOP Classes as an SCU, SCP or both. The Conformance Statement shall be in the format defined in PS3.2.
An implementation that conforms to one of the Composite Instance Root Retrieve SOP Classes as an SCU shall support transfers against the Retrieve Information Model described in Section Y.6.1.1 using the C-MOVE SCU Behavior described in Section Y.4.1.2. An implementation that conforms to one of the SOP Classes of the Composite Instance Root SOP Class Group as an SCU, and that generates retrievals using the C-MOVE operation, shall state in its Conformance Statement the Storage Service Class SOP Classes under which it shall support the C-STORE sub-operations generated by the C- MOVE.
An implementation that conforms to one of the Composite Instance Root Retrieve SOP Classes as an SCU shall support retrievals against the Retrieve Information Model described in Section Y.6.1.1 using the C-GET SCU Behavior described in Section Y.4.2.2. An implementation that conforms to one of the SOP Classes of the Composite Instance Root SOP Class Group as an SCU, which generates retrievals using the C-GET operation shall state in its Conformance Statement the Storage Service Class SOP Classes under which it shall support the C-STORE sub-operations generated by the C-GET.
An implementation that conforms to one of the Composite Instance Root Retrieve SOP Classes as an SCP for C-GET operations shall:1) support both levels of the Composite Instance Root Retrieve Only Information Model
2) support all three Frame Level keys
3) describe in its Conformance Statement the transformations it applies to a multi-frame Composite Instance when creating a new Composite Instance as defined in Section Y.3.3.
An implementation that conforms to one of the Composite Instance Root Retrieve SOP Classes as an SCP shall support retrievals against both levels of the Retrieve Information Model described in Section Y.6.1.1 using the C-MOVE SCP Behavior described in Section Y.4.1.3. An implementation that conforms to one of the SOP Classes of the Composite Instance Root SOP Class Group as an SCP, which satisfies retrievals using the C- MOVE operation shall state in its Conformance Statement the Storage Service Class SOP Classes under which it shall support the C-STORE sub-operations generated by the C- MOVE.
An implementation that conforms to one of the Composite Instance Root Retrieve SOP Classes as an SCP shall support retrievals against both levels of the Retrieve Information Model described in Section Y.6.1.1 using the C-GET SCP Behavior described in Section Y.4.2.3. An implementation that conforms to one of the SOP Classes of the Composite Instance Root SOP Class Group as an SCP, and that satisfies retrievals using the C-GET operation, shall state in its Conformance Statement the Storage Service Class SOP Classes under which it shall support the C-STORE sub-operations generated by the C-GET.
The SOP Classes in the Composite Instance Root SOP Class Group of the Query/Retrieve Service Class identify the Composite Instance Root Retrieve Only Information Model, and the DIMSE-C operations supported. The Standard SOP Classes are listed in Table Y.6.1.3-1.