DICOM PS3.4 2022d - Service Class Specifications
C.6.4.5.5 File Set Access Sequence and File Access Sequence

An SCP that supports File Set Access Sequence (0008,0419) at the Study or Series query level shall support either Metadata Sequence (0008,041D) or Updated Metadata Sequence (0008,041E), or both, at the same level(s).

An SCP that supports File Access Sequence (0008,041A) at the Instance query level shall support either Metadata Sequence (0008,041D) or Updated Metadata Sequence (0008,041E), or both, at that level.

The SCP may support Metadata Sequence (0008,041D) or Updated Metadata Sequence (0008,041E) without support of File Set Access Sequence (0008,0419) or File Access Sequence (0008,041A).

See Section C.6.4.1.4 for further explanation.

DICOM PS3.4 2022d - Service Class Specifications