Name 

Description 

Extension Point (UML 1.5) 

An extension point refers to a location within a use case where you can insert action sequences from other use cases.
An extension point consists of a unique name within a use case and a description of the location within the behavior of the use case.
In a use case diagram, extension points are listed in the use case with the heading "Extension Points" (appears as bold text in the Diagram View). 

UML 1.5 Use Case Diagram Definition 

Use case diagrams are helpful in three areas:

• Determining features (requirements): New use cases often generate new requirements as the system is analyzed and the design takes shape.
• Communicating with clients: Notational simplicity makes use case diagrams a good way for developers to communicate with clients.
• Generating test cases: The collection of scenarios for a use case may suggest a suite of test cases for those scenarios.

 

UML 1.5 Use Case Diagram Elements 

The table below lists the elements of UML 1.5 Use Case diagrams that are available using the Tool Palette.
UML 1.5 Use Case diagram elements