BACM — Unclear specification of instantiation of variable arity relationships

The last para says “In this case, instances may be created with an arity specified by the user and with instance leg names specified by the user.” but no indication as to how this might be done (such dynamic meta-level property renaming or multiplicity changing is not even part of SMOF).

Add a reference to revised section 7.2.2 in the paragraph of 7.2.4.2

A revision to section 7.2.3 is proposed in BACM-44. This revision explain that some model elements that are instances of metaclasses represent collections of things with identical or similar characteristics (i.e. they are sets defined by the structural properties of the model element). This association allows the modeler to create semantic hierarchies of such model elements.