You can create the following objects in a communication diagram:
|
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). |