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».
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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
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How did we call the <<extend>> notation in earlier versions of UML?
<<extends>>
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