ST6RI-932 SysML 2.1 Ballot #2 - Abstract Syntax

[seidewitz]

This PR implements resolutions for the following issues that were approved on SysML 2.1 RTF Ballot 2.

• SYSML21-15 Error in constraint validateAssignmentActionUsageReferent
  • Fixed the derivation and validation of AssignmentActionUsage::referent.
• SYSML21-17 Error in constraint validateAssignmentActionUsage
  • Implemented a validation check for validateAssignmentActionUsageReferentIsTimeVarying and a corresponding Xpect test.
• SYSML21-419 Derivation of ownedMetadata is incorrect
  • Implemented setting delegates for computing Definition::ownedMetadata and Usage::nestedMetadata and a corresponding test in SysMLInteractiveTest.
  • Note that the default would be sufficient and the new delegates unnecessary if the subsetting of these properties had been properly changed in the specification addition to their derivation (see SYSML21-648).

Resolutions for the following issues had been implemented previously. This PR removes TODO comments related to updating the specification for them (as has now been done).

• SYSML21-4 Error in constraint checkConstraintUsageCheckedConstraintSpecialization
• SYSML21-299 Constraint checkIncludeUseCaseSpecialization is misnamed
• SYSML21-301 Viewpoint specialization constraints are incorrect
• SYSML21-309 Constraint checkRequirementUsageObjectiveRedefinition needs to handle feature chains

Other abstract syntax issues on Ballot 2 do not require changes to the implementation in this PR. Note that updating the .uml and .ecore metamodel files was already addressed by PR #760.