In UML models, an extend
relationship indicates that the extension use case extends the behaviors
in a base use case.
Before you begin
You must have a least two use cases
in a diagram.
About this task
To add an extend relationship:
Procedure
- In the Palette, on the Create tab,
under Use-case , click Extend.
- Click the extension use case and drag the cursor to the
base use case.
- On the pop-up menu, click Create new Extension
Point.
Results
The extend relationship is added between the base use case
and the extension use case and a new extension point is added to the
Extension Points compartment of the base use case.