Message
Concept
A message is a container for data. It may contain structured data or binary data. Structured messages are internally represented by a DOM tree. The structure of such a message is defined by a Message Type

A message also contains some properties; these are named values describing the message like its Content-Type.
The following picture shows how a structured message read from a CSV file is represented graphically in the Designer.

Structured messages are typically created by a Deserializer, e.g. the CSV deserializer.