SysML Use Case Diagram Modeling Guidelines

The Use Case Diagram describes the usage of a system (subject) by its actors (environment) to achieve a goal, that is realized by the subject providing a set of services to selected actors. OMG Systems Modeling Language (OMG SysML™) Version 1.6

The following guidelines apply:

Actors with Attributes

MagicDraw doesn’t Allow for Actors which have attributes.

Actors with Properties are transformed to Classes

Associations

OMG Systems Modeling Language (OMG SysML™) Version 1.6

• SysML does not allow composite association between an actor and a use case.
• SysML does not allow an association (of any kind) between two actors.
• SysML does not allow an association (of any kind) between two use cases.

Directed Associations:Use Case to Actor

You can modify an association in Rhapsody from a Use Case to an Actor (One End). MagicDraw requires the relationship defined at both ends. The publisher has a fix to identify these relationships and transform them appropriately.

The figure below shows an example of a directed association between a Use Case and an Actor on the left in the source tool. The right is the target tool.

Include/Extend Relationships

In MagicDraw there isn’t the label on the line for Include or Extend, it is a specific line type. The tool transforms the content as needed for MagicDraw but in order to display these labels on the diagram the publisher creates a Stereotype that can be displayed.