UML Symbols (use case diagrams) - Methodologies - CCEA - SSD

A stick figure represents an actor (user) or

another system interacting with the system.

An oval is used to represent a use case.

This is a function or feature that the

system provides.

A rectangle represents a system boundary.

This defines the scope of the system.

A line represents an association. This shows an

interaction between an actor and a use case.

A dashed arrow with <<include>> represents a

required function used within another use case.

A dashed arrow with <<extend>> represents an

optional function that extends the main use case.

A circle represents an initial state which is the

start of a process.

A circle with a boarder represents the final state

and indicates the end of a process.

A component is a piece of software within a

system

A node represents a physical component.

Association

Association

Generation

Uses

Is a

Has

Knows