UML14 — Compliance ambiguity

Although the current specification defines the basic units of
compliance for UML, it does not clearly specify the extent to which they may
be omitted (via the "no/incomplete" Valid Options in the summary table on p.
xxv) before the implementation is not considered OMG UML. (As a degenerate
case, it could be argued that they all could be omitted and that an
implementation might still claim compliance.) Further note that the optional
compliance of OCL is discussed as a special case on p. xxiii, although no
special treatment of its compliance is reflected in the summary table.
Optional compliance needs to be more clearly specified before we consider
future optional compliance points, as some are proposing for the Action
Semantics.

duplicate