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Activity diagrams [1] are graphical representations of workflows of stepwise activities and actions [2] with support for choice, iteration, and concurrency. 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.
This view includes sequence diagrams, activity diagrams and state machine diagrams. UML models can be exchanged among UML tools by using the XML Metadata Interchange (XMI) format. In UML, one of the key tools for behavior modeling is the use-case model, caused by OOSE. Use cases are a way of specifying required usages of a system.
An activity diagram, with the activity "Cooking Spaghetti" outlined with an "Activity frame" An activity in Unified Modeling Language (UML) is a major task that must take place in order to fulfill an operation contract. The Student Guide to Object-Oriented Development defines an activity as a "sequence of activities that make up a process."
Business Process Model and Notation (BPMN) is a standard for business process modeling that provides a graphical notation for specifying business processes in a Business Process Diagram (BPD), [3] based on a flowcharting technique very similar to activity diagrams from Unified Modeling Language (UML). [4]
Diagram illustrating how the relative emphasis of different disciplines changes over the course of the project. The unified process is an iterative and incremental development process. The elaboration, construction and transition phases are divided into a series of timeboxed iterations. (The inception phase may also be divided into iterations ...
When using UML, the activity diagram typically takes over the role of the data-flow diagram. A special form of data-flow plan is a site-oriented data-flow plan. Data-flow diagrams can be regarded as inverted Petri nets, because places in such networks correspond to the semantics of data memories. Analogously, the semantics of transitions from ...
Class diagram showing generalization between the superclass Person and the two subclasses Student and Professor The generalization relationship—also known as the inheritance or "is a" relationship—captures the idea of one class, the so-called subclass , being a specialized form of the other (the superclass , super type , or base class ).
The ACD is a modeling tool that was developed in 1960 following the flow diagram method of K.D. Tocher. [2] It pertains to the activity-based paradigm of system modeling, as opposed to process-oriented or event-based paradigms.