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Questions and Answers
What is the primary use of sequence diagrams?
What is represented on the vertical axis of a sequence diagram?
How many parts does a sequence diagram typically consist of?
What is an example of a notation used in a sequence diagram?
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What is an example of an interaction that can be modeled using a sequence diagram?
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What is an example of a concept that can be modeled using a sequence diagram?
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Study Notes
UML Sequence Diagrams
- Interaction diagrams that detail how operations are carried out
- Used to capture the interaction between objects in the context of a collaboration
Uses of Sequence Diagrams
- Transition from requirements expressed as use cases to a more formal level of refinement
- Refining use cases into one or more sequence diagrams
Characteristics of Sequence Diagrams
- Time-focused, showing the order of interaction visually using the vertical axis to represent time
- Show what messages are sent and when
Sequence Diagram Notations
- Captures interaction in different levels of granularity
Drawing Sequence Diagrams
- Decide when to draw a sequence diagram based on specific requirements
- Follow a structured approach to draw a sequence diagram
Sequence Diagram Examples
- Booking a seat: interactions between a user and a ticket booking system
- Patient admission process: using timing and duration constraints
- Recursive message use in interaction modeling
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Description
Learn about sequence diagrams, a type of interaction diagram, their uses, and characteristics. Understand how they are used to refine use cases and capture object interactions.
