2.2.3.2.2 Register Element
The Register Element is a Register element, as specified in [WSC10] and [WSC11], with the additional constraints listed in the following figure.
Figure 8: Register Element constraints
The Enlistment Element (section 2.2.3.1.3) MUST be the only element in the WS-Addressing ReferenceParameters element [WSADDR] in the WS-Coordination ParticipantProtocolService element in the Register Element.
The Loopback Element (section 2.2.3.1.4) MUST be the first Any element in the WS-Coordination ParticipantProtocolService element in the Register Element.