The Interrupt Flow defines the two UML concepts of connectors for Exception Handler and Interruptible Activity Region. The Control Flow connects two nodes in an Activity diagram, modeling an active transition.Īn Object Flow connects two elements, with specific data passing through it, modeling an active transition.
The Exception Handler element defines the group of operations to carry out when an exception occurs.ġ) Split a single flow into a number of concurrent flowsģ) Both join and fork a number of incoming flows to a number of outgoing flows The Flow Final element depicts an exit from the system, as opposed to the Activity Final, which represents the completion of the Activity.Įnterprise Architect supports two types of Region element: Expansion Regions and Interruptible Activity Regions.Īn Expansion Region surrounds a process to be imposed multiple times on the incoming data, once for every element in the input collection.Īn Interruptible Activity Region surrounds a group of Activity elements, all affected by certain interrupts in such a way that all tokens passing within the region are terminated should the interruption(s) be raised. The Activity Final element indicates the completion of an Activity upon reaching the Final, all execution in the Activity diagram is aborted. It is used to split and rejoin periods of parallel processing.Īn Initial element is used to define the start of a flow when an Activity is invoked. A UML activity diagram is a directed graph, consisting of nodes and edges, where nodes mainly contain basic activity nodes, object nodes, and control nodes. The Send element depicts the action of sending a signal, in an Activity diagram.Ī Receive element defines the acceptance or receipt of a request, in an Activity diagram.Ī Synch state is useful for indicating that concurrent paths of a StateMachine are synchronized. In an Activity diagram or Interaction Overview diagram, a Decision indicates a point of conditional progression: if a condition is True, then processing continues one way if not, then another.Ī Merge Node brings together a number of alternative flow paths in Activity, Analysis and Interaction Overview diagrams.
An Activity element organizes and specifies the participation of subordinate behaviors, such as sub-Activities or Actions, to reflect the control and data flow of a process.Ī Structured Activity is an activity node that can have subordinate nodes as an independent Activity Group.Īn Action element describes a basic process or transformation that occurs within a system, and is the basic functional unit within an Activity diagram.Ī Partition element is used to logically organize an Activity's elements.Īn Object is a particular instance of a Class at run time.Ī Central Buffer Node is an object node for managing flows from multiple sources and destinations, represented in an Activity diagram.Ī Datastore defines permanently stored data.
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