![]() This an optional element but useful when you’re visualizing large systems. The system is used to define the scope of the use case and drawn as a rectangle. It’s drawn as an oval and named with the function. This could be a person, organization or an external system and usually drawn like skeleton shown below.Ī use case represents a function or an action within the system. ActorĪctor in a use case diagram is any entity that performs a role in one given system.
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