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http://www.visual-paradigm.com/ Sequence diagram helps in expressing the interactions between objects against the time. With its easy to read and understand nature, it quickly become one of the most popular diagram in UML. During modeling sometimes you may need to introduce the condition for triggering various message call between the objects. Of course you can model this by define the combined fragment. But for a simple one you can model this by defining guard condition to your call message. In this video we will show you how to define the guard condition for a call message. More about Sequence Diagram in Visual Paradigm http://www.visual-paradigm.com/features/uml-and-sysml-modeling/#sequence-diagram Try it for FREE http://www.visual-paradigm.com/download/
