let’s say, I have two UseCases in a UseCase diagram. One UseCase is called “enter order” while the second is called “login”. In UseCase “enter order” there is an extension point for the “login” UseCase. Now I start modeling the activity diagram of “enter order” in the composite view.
And somewhere in the “enter order” model, I have to include the call of the “login” UseCase. Since the “login”-UseCase is no simple activity or action, I don’t know what UML compliant element I should use.
How do you model the call to other UseCases in an activity diagram ? :?: