You can create the following objects in a sequence 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). |
|
Activation |
 |
 |
Execution of a procedure, including the time it waits for nested procedures to execute. See Activations (OOM). |
|
Interaction Reference |
 |
 |
Reference to another sequence diagram. See Interaction References and Interaction Activities (OOM). |
|
Interaction Fragment |
 |
 |
Collection of associated messages. See Interaction Fragments (OOM). |
|
Message |
 |
 |
Communication that conveys information with the expectation that action will ensue. See Messages (OOM). |
|
Self Message |
 |
 |
Recursive message: the sender and the receiver are the same object. See Messages (OOM). |
|
Procedure Call Message |
 |
 |
Procedure call message with a default activation. See Messages (OOM). |
|
Self Call Message |
 |
 |
Procedure call recursive message with a default activation. See Messages (OOM). |
|
Return Message |
 |
 |
Specifies the end of a procedure. Generally associated with a Procedure Call, the Return message may be omitted as it is implicit at the end of an activation. See Messages (OOM). |
|
Self Return Message |
 |
 |
Recursive message with a Return control flow type. See Messages (OOM). |