"UML activity diagrams as a workflow specification language." ≪ UML≫ 2001-The Unified Modeling Language. Documentįormal/, Object Management Group, February 2007. ^ OMG Unified Modeling Language Superstructure Specification, version 2.1.1.The Unified Modeling Language Reference Manual. OMG Unified Modeling Language Specification, Version 1.4 (final draft). It is possible to verify such a specification using model checking technique. UML activity diagrams in version 2.x can be used in various domains, e.g. These changes cause many UML 1.x activity diagrams to be interpreted differently in UML 2.x.
While in UML 1.x, activity diagrams were a specialized form of state diagrams, in UML 2.x, the activity diagrams were reformalized to be based on Petri net-like semantics, increasing the scope of situations that can be modeled using activity diagrams. However, the join and split symbols in activity diagrams only resolve this for simple cases the meaning of the model is not clear when they are arbitrarily combined with decisions or loops. Typical flowchart techniques lack constructs for expressing concurrency. an encircled black circle represents the end ( final node).Īrrows run from the start towards the end and represent the order in which activities happen.Īctivity diagrams can be regarded as a form of a structured flowchart combined with a traditional data flow diagram.a black circle represents the start ( initial node) of the workflow.bars represent the start ( split) or end ( join) of concurrent activities.Construction Īctivity diagrams are constructed from a limited number of shapes, connected with arrows. Although activity diagrams primarily show the overall flow of control, they can also include elements showing the flow of data between activities through one or more data stores. In the Unified Modeling Language, activity diagrams are intended to model both computational and organizational processes (i.e., workflows), as well as the data flows intersecting with the related activities. Activity diagrams are graphical representations of workflows of stepwise activities and actions with support for choice, iteration and concurrency.
0 kommentar(er)
