Structure of NAMED_RULE versionable object

NAMED_RULE

 -MEMBER_COMPONENTS                                (via NAMED_RULE_REFERENCE)
 -FRAGMENT_USAGES                                  (via USED_IN_RULE_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