Use Case Diagram

Definition

A Use Case Diagram

PlantUML Elements

A PlantUML use case diagram specifies and shows the following:

• Actors
• Messages (methods) invoked by these actors
• Return values (if any) associated with previous messages
• Indication of any loops or iteration area

Example

@startuml
'https://plantuml.com/sequence-diagram

autonumber

Payer -> Payee: Payment 
Payee --> Payer: Payment Confirmation

Payer -> Payee: Another Payment
Payee --> Payer: Another Payment Confirmation
@enduml

References

• Sequence Diagram @ Wikipedia
• PlantUML Language Reference Guide