Chapter 21. Messages and Operations
The selection of a communications protocol establishes the technology that will be used to transport the data and perhaps the technology that will be used to represent the data. It generally does not establish either the semantics (meaning) or syntax (structure) of the message itself. When interacting components differ in their expectations concerning the semantics or syntax of the messages they exchange, some form of transformation is required as part of the exchange.
Message Semantics and Operation Names
When you look at a message, there are two relevant semantic questions: What does the content of the message represent? And what does the message as a whole represent? One does not necessarily imply the other. ...
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