In this video you will learn about sequence diagram. what is sequence diagram. Identify responsibilities/operations and assign them to classes UML provides two different mechanisms to document the dynamic behaviour of the system. These are sequence diagrams which provide a time-based view and Collaboration Diagrams which provide an organization-based view of the system’s dynamics. Let us first look at Sequence Diagrams. These diagrams illustrate how objects interacts with each other and emphasize time ordering of messages by showing object interactions arranged in time sequence. These can be used to model simple sequential flow, branching, iteration, recursion and concurrency. The focus of sequence diagrams is on objects (and classes) and message exchanges among them to carry out the scenarios functionality. The objects are organized in a horizontal line and the events in a vertical time line.
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