Creating associations for use cases

Associations represent lines of communication between actors and use cases. Use cases can associate only with actors, and vice versa.

Procedure

  1. Click the Association button Association button Association button.
  2. Click either the actor or the use case. The crosshairs change to a circle with crosshairs when you are on an element that can be part of an association.
  3. Move the cursor to the target of the association and click once. If the source is an actor, the target must be a use case, and vice versa.
  4. Type a name for the association, then press Enter.

Results

The new association is displayed in both the use-case diagram and the browser (under Association Ends category for the actor).

Association features include the type, name, roles, multiplicity, qualifiers, and description.

The Features window for composition associations is the same as that for bi-directional associations. For more information about the available fields, see Modifying features of bi-directional associations.


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