Creating actors in collaboration diagrams

An actor represents an element that is external to the system. A classifier role based on an actor represents a coherent set of operations and messages of an external element when it interacts with system elements during a scenario. You can choose an existing actor, create a new one, or set the classifier role to <Unspecified>, meaning that the actor is not a realization of an existing actor. This could be useful in diagrams created at the high-level analysis stage of system design. Actors are a stereotype of a class and are defined through a Features window that is, usually, the same as that for classes.

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To create an actor, see Creating actors.

By default, a new actor is an <Unspecified>Realization value. To make it an instance of a <New > or existing package, use the drop-down list in the Features window.


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