Term Definition: Message
Main Description

A Message is the object that is transmitted through a Message Flow. The Message will have an identify that can be used for alternative branching of a Process through the Event-Based Exclusive Gateway.

This term can be found in the OMG  Business Process Modeling Notation, V1.2 (Beta 3)  specification http://www.omg.org/docs/dtc/08-02-07.pdf