Chapter 20
Activity Diagrams
Sequence diagrams, communication diagrams, state diagrams, and use case diagrams also model the dynamic aspects of systems. Sequence and communication diagrams are discussed in Chapter 19; state diagrams are discussed in Chapter 25; use case diagrams are discussed in Chapter 18; actions are discussed in Chapter 16.
Activity diagrams are one of the five diagrams in the UML for modeling the dynamic aspects of systems. An activity diagram is essentially a flowchart, showing flow of control from activity to activity. Unlike a traditional flowchart, an activity diagram shows concurrency as well as branches of control.
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