Use the use case diagram to describe the external view of a system and its interactions with the outside world.
You can model use case diagrams using either UML 1.4 or UML 2.0 features.
By default, Together uses the UML 1.4 specification for modeling diagrams. To enable UML 2.0 support, see Enabling UML 2.0 Features.
The toolbar below shows the toolbar elements available for the use case diagram:
| Button | Description |
|---|---|
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Actor: Draws an actor within the Diagram view. |
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Use Case: Draws a use case within the Diagram view. |
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Generalization/Implementation Link: Draws a generalization link between use case elements. |
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Communicates Link: Draws a communication link between use case elements and actors. |
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Extend Link: Draws an extends link between use case elements. |
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Include Link: Draws an includes link between use case elements. |
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System Boundary: Draws a system boundary to separate a system from external actors. |
By default, Together uses the UML 1.4 specification for modeling diagrams. To enable UML 2.0 support, see Enabling UML 2.0 Features.
The toolbar below shows the toolbar elements available for the use case diagram with UML 2.0 features enabled:
In addition to the buttons listed above under the UML 1.4 Elements section, enabling UML 2.0 gives you the following elements:
| Button | Description |
|---|---|
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Subject: Draws a system boundary to separate a system from external actors. |
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Use Case Collaboration: Use to represent a conceptual modeling element to define ownership of subjects, use cases, and actors. |
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Specialize Link: Using this link allows you to show that a use case may be specialized by another use case |
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Performance Link: Use to model many to many relationships between actor and use cases. |