Elements in the activity diagrams

Write down the brief explanation of all elements in the activity diagrams?

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a) Activities: The activity points out an action which performed in the system.

b) Transitions: Transitions are symbolized by open arrow heads. Transitions are employed to point out the flow among elements in the diagram.

c) Decision Points: The logical branching is depicted through the decision points.

d) States: The state is shown in a rounded rectangle. States are pointed to illustrate the mile stones of processing in activity diagrams.

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