A message represents the content of a communication between two participants, and is passed along a message flow. In choreography diagrams, an initiating message is automatically colored white, and a non-initiating message is automatically colored grey.
Messages are based upon and share the same properties as standard BPM message formats (see Message Formats (BPM)).
To view all the messages exchanged between participants in your model, right-click the model node in the Browser and select . You can create and delete messages directly in this matrix.