Sequence Diagram Example: OperatorSyntax


A UML sequence diagram shows objects and the messages that are passed between these objects for the particular collaboration. This is a sequence diagram template that shows how alt can be used. The flow is controlled by evaluating the conditions defined.

To edit this sequence diagram template, simply click on Use this Template. Afterwards, you'll be able to add and remove actors and lifelines to your liking.

What is Sequence Diagram?

A sequence diagram (sometimes called event diagrams or event scenarios) shows object interactions arranged in time sequence. Sequence diagrams are typically associated with realization of a use case scenario. A sequence diagram depicts the objects participated in a use case scenario and the sequence of messages exchanged between the objects (also called the flow of event in textual form) needed to carry out the functionality of the scenario.

Which behavior diagram should you choose?

  1. You should use sequence diagrams when you want to look at the behavior of several objects within a single use case.
  2. If you want to look at the behavior of a single object across many use cases, use a state diagram.
  3. If you want to look at behavior across many use cases or many threads, consider an activity diagram.

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