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Understanding Sequence Diagrams
Message Types
- •Synchronous: Caller waits for response before continuing
- •Asynchronous: Caller continues without waiting (fire-and-forget)
- •Response: Return message, typically shown with dashed line
- •Self: Component calling itself (internal processing)
Best Practices
- •Keep diagrams focused on a single use case or flow
- •Use meaningful names for participants and messages
- •Order participants by their role in the flow (left to right)
- •Include error/failure paths for critical flows