UML diagram, which describes the overall functionality of a system in terms of actors, their goals represented as use cases, and any dependencies among those use cases.
Use Case Diagram Elements
Use Case Diagram can consist of these types of elements:
-Actor
-Use Case
-Collaboration
-Association
-Include
-Extend
-Generalization
-System Boundary
Actor
Actor can be a person (e.g. user), organization or any other interacting system.
Use Case
Extend
Include
