Message sets
A message set is a container for grouping messages and
associated message resources (elements, types, groups).
Message files
A message file (also called a message definition file)
contains the messages, elements, types and groups which make up a message
set. A message file has the extension .sfmxsd.
Message model objects
This is an introduction to the various objects which make up a
message model.
Namespaces
XML instance documents and XML Schemas can make use of
namespaces. Namespaces provide a method to qualify artifact names.