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Module 2: Introduction to UML - page 16 / 48

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Diagrams in UML  - Uses and Extends in Use Case Diagram

A uses relationship shows behavior common to one or more use cases

An extends relationship shows optional/exceptional behavior

Register for courses

<<uses>>

Logon validation

<<uses>>

Maintain curriculum

Register for

Distance Learning courses

<<extends>>

Create course

<<uses>>

Maintain Schedule

<<uses>>

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