Domain Payload

The payload part of a Composite Message Type. In other words: the subject of the ControlActProcess class as contained in the Trigger Event Control Act Wrapper.

The domain payload typically consists of an R-MIM as defined by the appropriate domain comittee. Example: the Laboratory SIG has defined an R-MIM for "Notification of a Lab Result". This Domain Payload in encapsulated in wrappers to form a Composite Message Type.

In the future, a domain payload may itself be a Wrapper, which contains its own domain payload (or potentially multiple payloads).

Note that the Domain Payload mostly consist of 1 Message Type. Conceptually one could have multiple (different) payload Message Types, this isn't done very often as it presents a problem for the current XML ITS, and isn't supported by the publication database.