You can create the following objects in ause case diagram:
|
Object |
Tool |
Symbol |
Description |
|---|---|---|---|
|
Actor |
 |
 |
Used to represent an external person, process or something interacting with a system, sub-system or class. See Actors (OOM). |
|
Use case |
 |
 |
Defines a piece of coherent behavior in a system, without revealing its internal structure. See Use Cases (OOM). |
|
Association |
 |
 |
Communication path between an actor and a use case that it participates in. See Use Case Associations (OOM). |
|
Generalization |
 |
 |
A link between a general use case and a more specific use case that inherits from it and add features to it. See Generalizations (OOM). |
|
Dependency |
 |
 |
Relationship between two modeling elements, in which a change to one element will affect the other element. See Dependencies (OOM). |