Structure of DIAGRAM versionable object

DIAGRAM

 -DIAGRAM_ELEMENT_USAGES                           (via DIAGRAM_REFERENCE)
 -FILE_USAGES                                      (via DIAGRAM_REFERENCE)
 -DIAGRAM_SEGMENTS                                 (via DIAGRAM_REFERENCE)

Also included in this versionable object are:

- Any user defined EXTENDED_STRUCTURE_ELEMENTS owned by the above

- Any TAGGED_VALUES and/or ELEMENT_RULE_USAGES for the above