![]() high-level interactions between user of the system and the system, between the system and other systems, or between subsystems (sometimes known as system sequence diagrams).Sequence Diagrams captures interaction in different level of granularity: Sequence diagrams are time focus and they show the order of the interaction visually by using the vertical axis of the diagram to represent time what messages are sent and when. Use cases are often refined into one or more sequence diagrams. As sequence diagrams can be used to capture the interaction between objects in the context of a collaboration, one of the primary uses of sequence diagrams is in the transition from requirements expressed as use cases to the next and more formal level of refinement. ![]() ![]() ![]() UML Sequence diagrams are interaction diagrams that detail how operations are carried out. A sequence diagram describes an interaction among a set of objects participated in a collaboration (or scenario), arranged in a chronological order it shows the objects participating in the interaction by their "lifelines" and the messages that they send to each other. ![]()
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