Use Case diagram model element notation differences

You can use the mapping table for Use case diagram model elements to understand the differences between UML 1.4 and UML 2.0.

UML 1.4 UML 2.0
Actor (A Class stereotyped as Actor) Actor

If an actor owns attributes or operations, it will remain a Class stereotyped as Actor.

Association relationship to (or from) a Use Case Association
Note: A navigable association relationship pointing to a use case end imports without the arrowhead. A use case cannot own properties so the association end that typically defines the association cannot be navigable.
Dependency Relationships UML 2.0 Dependency (except for extend and include dependencies)
Extend (Dependency stereotyped as Extend) Extend relationship
Generalizations (invalid ones, such as a class that specializes a signal) Dependency relationship (with a corresponding keyword)
Include (Dependency stereotyped as Include) Include relationship
Use Cases (that own multiple interactions) Collaboration (only one), reference by the Use Case as a subject.
Use Case Realization (or a stereotyped use case realization) Collaboration (only one)
Related reference
Activity diagram model element UML notation differences
Class diagram model element UML notation differences
Collaboration diagram model element notation differences
Component diagram model element notation differences
Deployment diagram model element notation differences
Sequence diagram model element notation differences
Statechart diagram model element notation mappings
Notational differences in expressing multiplicity
Specific UML 2.0 semantic mapping
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