Transmission Wrapper and Control Act Wrapper

This specification defines HL7 V3 Composite message is composed of:

1. An HL7 Transmission wrapper (always)

2. A Trigger Event Control Act (required for all messages except accept level acknowledgements, for which it is not permitted)

3. The HL7 Domain Content specified by an HL7 domain specific technical committee (required for each Trigger Event Control Act)

The HL7 Transmission wrapper is specified in domain: Transmission Infrastructure. This domain specification describes the details on composing a V3 composite message and exchanging the composite message between systems. It covers features like acknowledgements, sequence no. protocol support, error handling and security. Trigger Event Control Act is detailed in domain: Message Control Act Infrastructure. This details the administrative information about the data being transmitted. Thus the interactions define the complete set of information that is required to exchange HL7 data between the systems.