What is the difference between a UML actor and a UML profile?

A UML actor models an entity that interacts with a system object and a UML profile provides a way of extending an existing model to other domains or platforms.

What is actor in UML diagram?

An actor in the Unified Modeling Language (UML) “specifies a role played by a user or any other system that interacts with the subject.” “Actors may represent roles played by human users, external hardware, or other subjects.

What is actor and role?

An actor or actress (see below) is a person who portrays a character in a performance. The actor’s interpretation of a role—the art of acting—pertains to the role played, whether based on a real person or fictional character.

What is the difference between user and actor?

An actor can be a user, external hardware, or another system. The difference between an actor and an individual system user is that an actor represents a particular class of user rather than an actual user. The same user can also act as several actors (that is, the same person can take on different roles).

What is actor in system analysis and design?

An actor is someone or something outside the system that interacts with the system. A use-case is a sequence of actions a system performs that yields an observable result of value to a particular actor.

Can a system be an actor in UML?

System is never an actor in a use case model. You have to think about the thing that is triggering the system under investigation to carry out a process. The system itself is dumb and cannot trigger itself into action. It can only be triggered by a user or by Time.

When can a system be an actor?

As stated in another answer, an actor is a system or role interacting with the system under development. You should include a system as an actor in a use case if it is outside the system you are developing, and if it directly interacts with the system you are developing.

What represents and external users and users who interact with the system?

An actor represents an external interaction with the system rather than necessarily a real physical user.

What is the difference between stakeholder and actor?

As nouns the difference between actor and stakeholder is that actor is a person who performs in a theatrical play or film while stakeholder is a person holding the stakes of bettors, with the responsibility of delivering the pot to the winner of the bet.