Communication Diagram Objects

PowerDesigner supports all the objects necessary to build communication diagrams.

Object

Tool

Symbol

Description

Actor



An external person, process or something interacting with a system, sub-system or class. See Actors (OOM).

Object



Instance of a class. See Objects (OOM).

Instance link



Communication link between two objects. See Instance Links (OOM).

Message



Interaction that conveys information with the expectation that action will ensue. It creates an instance link by default when no one exists. See Messages (OOM).