Use Case Diagrams

In the UML, actors are represented by a stick figure, and use cases are shown as ellipses. A use case diagram simply shows the structural relationships between the actors and the use cases, not the dynamic relationships. The relationship between actors and use cases is shown via a directional association indicating the source of invocation. Figure 7-1 shows the Browse account and Transfer funds use cases for the HomeDirect system. Both are invoked by the customer.

Figure 7-1. A simple use case diagram

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