Understanding Message Part Structures
Message parts are rowset-based messages or nonrowset-based messages that you designate as a part message on the message definition. Message parts are used in container messages
Message parts can be re-used in multiple containers.
All parts in a container must be of the same type (Rowset-based or Nonrowset-based).
You create messages using the Message Builder page in the PeopleSoft Pure Internet Architecture.