Extending the behavior of use cases

In UML modeling, when you draw use case diagrams, you communicate the essence of the system or application without exposing any unnecessary details. It’s generally good practice to hide the complexity of the system, but there are times when you might need to expose details. You can depict these details in their own use cases and connect them to the base use cases, which enables you to reveal information that would otherwise be hidden.

Related concepts
Extend relationships
Extension points
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