Associations represent lines of communication
between actors and use cases. Use cases can associate only with actors,
and vice versa.
Procedure
- Click the Association button Association
button
.
- 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.
- 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.
- 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.