Activity Diagram Notation at a Glance - illustrated by Visual Paradigm Community Edition the best Free UML Tool in the Market. --http://www.visual-paradigm.com
Activity diagram is another important diagram in UML to describe the dynamic aspects of the system. In the Unified Modeling Language, activity diagrams are intended to model both computational and organizational processes (i.e. workflows). Activity diagrams are graphical representations of workflows of stepwise activities and actions with support for choice, iteration and concurrency. It is basically a flowchart to represent the flow from one activity to another activity. The activity can be described as an operation of the system.
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