Adding extend relationships to UML diagrams

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

  1. In the Palette, on the Create tab, under Use-case , click Extend.
  2. Click the extension use case and drag the cursor to the base use case.
  3. 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.

Feedback