Sequence Diagram
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Example of a UML 2 diagram A sequence diagram in a Unified Modeling Language (UML) is a kind of interaction diagram that shows how processes operate with one another and in what order. It is a construct of a Message Sequence Chart . A sequence diagram shows object interactions arranged in time sequence. It depicts the objects and classes involved in the scenario and the sequence of messages exchanged between the objects needed to carry out the functionality of the scenario.
Sequence diagram - Wikipedia, the free encyclopedia
It's February, and by now you've probably read about, or heard people talk about, making the change to UML 2.0--the new specification for UML that contains a number of improvements. Given the importance of the new spec, we are changing the basis of this article series, too, shifting our attention from OMG's UML 1.4 Specification to OMG's Adopted 2.0 Draft Specification of UML (a.k.a. UML 2). I hate to change emphasis from 1.4 to 2.0 in the middle of a series of articles, but the UML 2.0 Draft Specification is an important step forward, and I feel the need to spread the word. There were a couple of reasons that the OMG improved UML.
UML basics: The sequence diagram
UML sequence diagrams model the flow of logic within your system in a visual manner, enabling you both to document and validate your logic, and are commonly used for both analysis and design purposes. Sequence diagrams are the most popular UML artifact for dynamic modeling, which focuses on identifying the behavior within your system. Other dynamic modeling techniques include activity diagramming , communication diagramming , timing diagramming , and interaction overview diagramming . Sequence diagrams, along with class diagrams and physical data models are in my opinion the most important design-level models for modern business application development. Sequence diagrams are typically used to model: Usage scenarios .