An origin server shall support sets of transactions of this service that correspond to one or more UPS SOP Classes (DIMSE Service Groups). See Section CC.2 in PS3.4 . Additional requirements for an origin server that is also a Unified Worklist and Procedure Step SCP are described in Section CC.1 in PS3.4 .

A user agent or origin server implementing the Worklist Service shall comply with all requirements placed on the SCU or SCP, respectively, for the corresponding services in Annex CC “Unified Procedure Step Service and SOP Classes (Normative)” in PS3.4 including Conformance Statement requirements.

An implementation supporting the Worklist Service shall describe its support in its Conformance Statement and in its response to the Retrieve Capabilities transaction, and whether it plays the role of origin server, user agent, or both.