The possible options are OCL and plain text. In the Local Precondition and Local Postcondition tabs, select the language of the constraint expression from the Language list box.In the Properties, View, Description, and Custom tabs, configure standard properties of the element.Use the Object Inspector to adjust action properties, including:

Using decisions and merges, you can manage multiple outgoing and incoming control flows. Note that the flow final may not have any outgoing links. The flow final node means that a certain flow within an activity is complete. Data and control flows are different in UML 2.0.Ī control flow may have multiple sources (it joins several concurrent actions) or it may have multiple targets (it forks into several concurrent actions).Įach flow within an activity can have its own termination, which is denoted by a flow final node. By flow, we mean that the execution of one node affects and is affected by the execution of other nodes, and such dependencies are represented by edges in the activity diagram. The semantics of activities is based on token flow. The execution of an action represents some transformation or processing in the modeled system, be it a computer system or otherwise. Instead of showing the flow of messages, it depicts the architecture of the object residing in the system as it is based on object. Both the sequence and the collaboration diagrams represent the same information but differently. An action is an executable activity node that is the fundamental unit of executable functionality in an activity, as opposed to control and data flow among actions. The collaboration diagram is used to show the relationship between the objects in a system. An activity represents a behavior which is composed of individual elements that are actions. An action represents a single step within an activity, that is, one that is not further decomposed within the activity. Actions are not states (compared to UML 1.x) and can have subactions. These diagrams are suitable for business process modeling and. They provide a graphical notation to define the sequential, conditional, and parallel composition of lower-level behaviors.

In UML 2.0, activities consist of actions. Activity diagrams, also known as control flow and object flow diagrams, are one of the UML (unified modeling language 11 ) behavioral diagrams. If an action can be broken into a sequence of other actions, you can create an activity to represent them. Actions are the basic units of the system behavior.Īn Activity diagram enables you to group and ungroup actions. In this report we define a formal execution semantics for UML activity diagrams that is appropriate for workflow modelling. The activity diagram enables you to model the system behavior, including the sequence and conditions of execution of the actions. Go Up to UML 2.0 Activity Diagrams Definition

Activity diagram definition in uml