UML24 — Operation with multiple return parameter

We are talking about an operation declared in the UML metamodel, so

Operation::returnResult() : Parameter [0..1]

is definitely valid UML notation.

while

Operation::returnResult() : Set(Parameter)

which is the way it is now in spec is definitely not valid UML notation, it is supposed to be:

Operation::returnResult() : Parameter [*]

In both cases, the way OCL interprets the result of such opertion is similar to how it interprets any value, as a collection, and as such collection operations can be called on it.

Therefore, to be consistent, this operation should be changed have a simple "Parameter" as a return type.

However, if we are going to leave this operation with * multiplicity to be more robust or OCL friendly, then at least we should be consistent in those other cases, where we have singular return result.

OperationHasSingularReturnResult : 16
operation = <Operation> UML::Vertex::containingStateMachine () : StateMachine
operation = <Operation> UML::Transition::redefinitionContext () : Classifier
operation = <Operation> UML::Transition::containingStateMachine () : StateMachine
operation = <Operation> UML::Stereotype::profile () : Profile
operation = <Operation> UML::Stereotype::containingProfile () : Profile
operation = <Operation> UML::StateMachine::LCA (s1 : State, s2 : State) : Namespace
operation = <Operation> UML::State::redefinitionContext () : Classifier
operation = <Operation> UML::State::containingStateMachine () : StateMachine
operation = <Operation> UML::Region::redefinitionContext () : Classifier
operation = <Operation> UML::Region::containingStateMachine () : StateMachine
operation = <Operation> UML::Property::opposite () : Property
operation = <Operation> UML::Package::containingProfile () : Profile [0..1]
operation = <Operation> UML::Operation::type () : Type
operation = <Operation> UML::LinkAction::association () : Association
operation = <Operation> UML::Extension::metaclassEnd () : Property
operation = <Operation> UML::Extension::metaclass () : Class

The issue is obsolete. The generated Operation descriptions are now correct.
Disposition: Closed - No Change