An application developer decides to use the messaging system composition service while creating an outbound message to integrate with back-end systems and external applications. Each view created…

An application developer decides to use the messaging system composition service while creating an outbound message to integrate with back-end systems and external applications. Each view created needs to be used by the messaging system's compose service. Which three of the following fields must be used by the Messaging View Command of the messaging system's compose service?