assignment-action-usage-referent
Available in: SysML
This checks that assignment action has a referent member feature element.
This is impossible to trigger through textual syntax.
Specification
AssignmentActionUsagemust have anowned_membershipthat is not anOwningMembershipand whosemember_elementis aFeature.
Note that the SysML grammar uses FeatureChainMember to parse the referent
which allows the referent to be an owned member to a chained feature,
conflicting with the specification. This is a known issue in the specification.