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Relationship

A use case extends another use case to do more than the latter
Example: Capture Deal use case (keeps to the specified limits) is extended by Exceed Limits use case (to include Capture Deal with limits exceeded)
Example: Signing Car Purchase Contract use case (normally not dealing with insurance) is extended by Signing Insurance Policy use case (to include the car sale with an insurance for it)

$\begin{figure} \epsfig {file=carPurchase.eps} \end{figure}$
<<extend>> adds more info to allow the already complete use case to extend its use (Stereotype)

Ananda Amatya
11/3/1999