These are flashcards an notes made by students on topics like 'extension', 'extend' and 'line', originating from:

- Michael Jesse Chonoles
ISBN-10 0128096403 ISBN-13 9780128096406
1335 Flashcards & Notes
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Study Cards on extension, extend, line

How do we draw an extension?
An extension Use Case is drawn as a Use Case oval, with a dashed arrow line from the extension to the Base.

On the dashed line, place the «extend».

This is the opposite direction from that of the «include».
What is alsopossible with an extension use case? Name 3 things.
  • An extension Use Case can «include» other Use Cases and can have «extends» of its own.

  • The same extending Use Case can extend more than one Use Case.

  • Furthermore, an extending Use Case may itself be extended
How did we call the <<extend>> notation in earlier versions of UML?
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