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UML Use Case Diagram. Design Elements

UML Use Case Diagram is a type of Behavior Diagrams that displays the dependencies between the actors and use cases.

UML Use Case Diagram displays the system on the conceptual level.

The purpose of a UML Use Case Diagram is to demonstrate the various types of users of a system and the different ways of their interacting with this system. Use Case Diagrams are often used together with the textual use cases and other types of diagrams.

The notation for a Use Case Diagram involves the following types of symbols:

  • Use cases are represented as the horizontally shaped ovals and display the different uses.
  • Actors are the people that employ the use cases and are represented on the diagram as figures of persons. Actors cannot be related each to other (except relations of generalization/inheritance).
  • Associations are shown as lines between actors and use cases.
  • System boundary – the box with the name and ovals (use cases) inside that sets a system scope to use cases.
  • Packages that allow you to add the elements in groups.

The Rapid UML Solution for ConceptDraw DIAGRAM contains 13 vector stencils libraries with 393 interactive shapes that you can use to design your UML diagrams.

To design a Use Case Diagram use the UML Use Case Diagram library.

UML Use Case Diagram library contains 26 shapes:

  • Include relationship
  • Use case
  • Communicates relationship
  • Actor 1
  • Uses relationship
  • Extend relationship
  • Generalization relationship
  • Multiplicity: mandatory
  • Package
  • Multiplicity: many (zero or more)
  • Communication line
  • Use case set 2.0
  • Divider
  • Actor 2
  • System boundary
  • Frame, fragment
  • Note
  • Symbol << >>
  • Association Many-to-Many
  • Association One-to-Many
  • Smart connector (with options)
  • Interface
  • Smart connector
  • Line connector
  • Note connector

UML Use Case Diagram library

Pic.1. UML Use Case Diagram Library

UML Use Case Diagram. Design Elements *

Pic.2. UML Use Case Diagram Library Elements

ConceptDraw Rapid UML solution provide UML Use Case Diagram library of vector stencils for use case diagram elements like actors, use cases, connectors, etc.

Use the library UML Use Case Diagram to draw your own UML use case diagrams that show interactions between a roles (actors) and a system, to achieve a goal.


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