MOF14 — Representation of constraints

The MOF XMI file uses 'OCL' for the language of the constraints, whereas the last paragraph of section 3.9.2.1 says that 'MOF-OCL' should be used [due to the minor variations from UML's OCL which are enumerated in 3.9.3].

The description of the Constraint class in 3.4.27 should refer to how constraints are expressed for the MOF Model itself in 3.9.3 (using MOF-OCL). Though it should not be mandatory to use MOF-OCL, user-defined metamodels have the same requirements for constraint expression as the MOF Model and so the variant and usage of OCL is just as appropriate and necessary. Indeed it would be a lot more sensible to pull 3.9.3 out into a separate section since it applies to constraints in any MOF metamodel not just the MOF Model. NB This also needs to be reflected in the UML Profile for MOF.