Creating synchronous or asynchronous messages

In Unified Modeling Language (UML) sequence diagrams, you can add synchronous and asynchronous messages to lifelines to represent the communication between interaction instances. You can also specify the operations, or methods, of messages.

You must have a sequence diagram with multiple lifelines open in the diagram editor.
Note: When you create a synchronous message, a return message is created automatically.
To create a synchronous or asynchronous message:
  1. In the Palette, click Synchronous Message or Asynchronous Message.
  2. In the interaction frame, click a source lifeline and drag it to a target lifeline.
  3. Click inside the interaction frame.
  4. In the Enter Operation Name window, type a name for the operation and click OK.
Note: If the source lifeline is the same as the target lifeline, you create a self-directed message.

Parent topic: Developing messages

Related concepts
Messages

Related tasks
Adding create or destroy messages to lifelines
Deleting messages
Delaying the receipt of asynchronous messages

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