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Activity Diagram — Behavior as Flow
Step-by-step behavior with inputs, outputs, and decisions.
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◤ ◤ DEFINITION
What it is
An Activity diagram models behavior as a flow of actions, decisions, forks, and joins, with object flows carrying typed data between them.
◤ ◤ PURPOSE
Why it exists
Describes how a function unfolds over time — useful for use-case realization, scenario walk-throughs, and concurrency analysis.
◤ ◤ SEE ALSO