Include vs extends is nothing to do with 'always' or 'sometimes'. In UML 2. If the base use case is incomplete The included use case is like a sub function that is called. An extend use case can change any aspect of the base use case and in several places. Look at it this way; if I use MSWord to open the base use case, turn on track-changes and then edit it to represent changes I want to make usually but not limited to additional functionality the extending use case represents those tracked changes.
Include usecase is shared can be resuse but extend class relationship can't shared or reuse. Post New Answer. The inheriting use case would completely replace one or more of the courses of action of the inherited use case. DwB DwB My question is since an included use case is a mandatory part of some use case, What is the purpose of depicting it. I simlply write the Main use case and will explain the included use case in the use case text story. You draw the included use case because you want to clearly point out that the included use case is not duplicate but is, instead, shared functionality.
Duplicate being coded more than once, shared being coded once. Motti Motti k 44 44 gold badges silver badges bronze badges. Well this is expected project presentation exam question, hope my teacher get it right : — SMUsamaShah.
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