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Sequence Elements

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

Element descriptions

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