SYSML2 — Subsetting of subjectParameter properties is wrong

The properties RequirementUsage::subjectParameter and CaseUsage::subjectParameter in the abstract syntax SysML.xmi currently subset Behavior::parameter. However, neither RequirementUsage nor CaseUsage specialize Behavior. Rather they (indirectly) specialize Step, so the subjectParameter properties should be subsetting Step::parameter rather than Behavior::parameter.

(Note that this error is not apparent in the specification document, because, in the annotation for subsetting, the subsetted parameter is shown without qualification – e.g., just parameter, not Behavior::parameter.)