Actors & Use Cases

Defining Actors

Actors represent users or external systems that interact with your system. You can define actors using several syntaxes:

Basic Actor Syntax

Actor with Colon Syntax

Business Actor

Business actors are represented with a rectangle instead of a stick figure. Use the / modifier:

Defining Use Cases

Use cases represent the functionality or services provided by the system. They are displayed as ovals.

Basic Use Case Syntax

Use Case with Alias

Use Case with ID and Name

You can define a use case with an ID and a descriptive name:

Business Use Case

Business use cases are displayed with a dashed border. Use the / modifier:

Stereotypes

Add stereotypes to actors and use cases using double angle brackets:

Multiline Content

Use cases can contain multiline text and separators for better organization: