![]() They are are closer to the actual code as they show all cross-system messages. Sequence diagrams extend use-case diagrams - they model the series of events that a scenario or use-case must execute. They are used to plan the development or extension of a software product and complement UML class diagrams, showing which class data is passed between which elements. The events that cross system boundaries are used by objects and people (actors) to complete their processes.Īlso known as system sequence diagrams, they are one of the main types of UML diagrams. ![]() ![]() ![]() Sequence diagrams show the order of messages that are passed between elements of a system to complete a particular task or use case. ![]()
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