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Use case diagram legend


Each use case has a Universal Modeling Language (UML) robustness diagram associated with it. A robustness diagram depicts the core components of a system and how the components communicate or collaborate with one another to satisfy a use case. Arrows between the components indicate the flow of information between the components.

The following symbols are used:

Symbol

Meaning

UML_Actor.PNG

Actor — User role that interacts with a component in the system

UML_Boundary.PNG

Boundary — Component that represents an interface with which Actors interact

UML_Entity.PNG

Entity — Domain objects within the system that typically present a persisted state of that object

UML_Control.PNG

Control — Components that connect Boundary and Entity components and implement some logic to manage the interaction between them

 

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