Active element external to the system, and cooperating with it.
An actor is an idealization of an external person, process, or thing interacting with a system, subsystem, or class. An actor characterizes the interactions that outside users may have with the system. An actor may be a human, an external software component, a device that cooperates with the system.Actors can have communication links with Use Cases . They can as well communicate between actors (extension of Objecteering to UML).Actors can appear in sequence diagrams (see Example2), or collaboration diagrams, where the accurate communication with system's objects is shown. Actor is a specific kind of Classifier. An Actor can have generalization links with other actors, can have attributes and even operations. An Actor under Objecteering physically belongs to a NameSpace, that must be a Package.
Stéréotype : "UML"
Classes parentes :
Diagrammes de classes : Associations :