Open
Description
OpaqueBehaviors are not part of the fUML subset, because they cannot have any standard semantics within fUML. However, it would still be useful to have a way to link the implementations of other languages into the fUML Reference Implementation, so that OpaqueBehaviors (and perhaps OpaqueExpressions and OpaqueActions) with bodies in these languages could be executed by calling out to the linked implementations. This should allow execution of bodies in standard UML-related languages such as OCL and Alf, but should not be limited to these.