Sequence Elements

The example below shows some possible elements of Sequence diagrams and their stereotyped display.

SequenceDiagramElements

 

Element

Description

See also

Actor

An instance of an actor at runtime; this can be depicted either as the human figure or in rectangle notation.

 

Actor

Lifeline

An Object element with the stereotype Lifeline.

 

Lifeline

Boundary

Represents a user interface screen or input/output device.

 

Boundary

Entity

A persistent element - typically implemented as a database table or element.

 

Control

Control

The active component that controls what work gets done, when and how.

 

Entity