SOP Instance UID as defined in the PS 3.3. This parameter is REQUIRED.
The parameter name shall be “objectUID” for URI based mode, and for the WS mode one or multiple “DocumentRequest” which is included into the above described “SeriesRequest” and which include each one:
a required “ DocumentUniqueId” which contains the Instance UID,
an optional “RepositoryUniqueId” which contains the UID of the DICOM server, and
an optional “HomeCommunityId” which contains the UID of the “clinical affinity domain” .
The value shall be encoded as a unique identifier (UID) string, as specified in PS 3.5, except that it shall not be padded to an even length with a NULL character.