Sequence Diagrams
Sequence diagrams are a type of interaction diagram that show how processes operate with one another and in what order. They are excellent tools for documenting and validating your system's logic and behavior over time.
Sequence diagrams in Modeldraw allow you to:
Visualize the sequence of interactions between objects in a system
Model the flow of logic within your system in a clear, readable manner
Represent concurrent processes
Document scenarios in use cases
Plan and understand the detailed functionality of an existing or future system
Key Components
A sequence diagram in Modeldraw consists of several key components:
Lifelines: Represent individual participants (objects or actors) in the interaction.
Messages: Show communication between lifelines.
Activation Bars: Indicate when a lifeline is active or performing an action.
Lifelines
Lifelines represent objects or actors that participate in the sequence. They are drawn as dashed vertical lines with a rectangle at the top containing the object's name.
Messages
Messages are represented by arrows between lifelines. They can be:
Synchronous (filled arrowhead)
Asynchronous (open arrowhead)
Reply (dashed line with open arrowhead)
Activation Bars
Activation bars are rectangular boxes on lifelines that represent the time an object is performing an action.
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