Part 4
2 chapters
Message Construction
What goes inside a message — command, document, and event messages, request-reply, correlation, sequencing, and expiration.
Chapter 7
Message Types
Command, document, and event messages — the three semantic types that determine what a message means and how the receiver should handle it.
Chapter 8
Message Metadata
Request-reply, correlation identifiers, return addresses, message sequences, expiration, and format indicators — the metadata that makes asynchronous conversations possible.