DICOM PS3.4 2019c - Service Class Specifications
C.2.2.2.2 List of UID Matching

A List of UIDs is encoded by using the value multiplicity operator, backslash ("\"), as a delimiter between UIDs. Each item in the list shall contain a single UID value. Each UID in the list contained in the Identifier of the request may generate a match.

Note

A list of single values is encoded exactly as a VR of UI and a VM of Multiple (see PS3.5).

DICOM PS3.4 2019c - Service Class Specifications