Overview

Reference

## Message:

The message contains only one value bundle. The bundle name is the message name. There are three types of messages: 'command's, 'event's, and 'request's. Messages have their type in the name. A message has values that are required or optional. The optional ones in a request will set during processing and can then be used by the workflow for further processing. Only a workflow (node) can build, send and receive an request message.