Type to start searching...
A message is represented internally (in canonical form) as a tree of parts.
The message root's child parts are either messages (composite parts that may have more child parts) or values (primitive parts - string, integer, date, ...). The child parts share the mapping format of the root part.
The message's root part and any composite parts (messages) may have a parts collection. Primitive parts (values) don't have a parts collection.