In an enterprise that uses Message Channels to connect between two different applications, you must package information as a message. Messages facilitate information transmission from one application to another. In this case, the Message EIP is used as the transfer medium.
For more information, go to Message.
How the ESB profile supports the Message EIP
For example, the following code segment illustrates a SOAP message of a typical request that is transformed by the ESB Profile based on its mediation flow, which contains a header and a body. The header holds information about the data being transmitted, its origin, and its destination, and the body holds the actual data.