UML Designer User's Guide


Sequence diagrams

The third type of UML diagram you can build with UML Designer is the sequence diagram.

Like a class diagram, a sequence diagram is another view of the model; each figure in a sequence diagram is attached to an underlying model element. Because a sequence diagram depicts message sends and returns between objects, your class designs must have some defined behavior before you can build a sequence diagram.

A sequence diagram uses instances (rather than class designs) because it shows an actual series of message sends between instantiated objects at run time. However, you can also create and use instances in class diagrams or in the Relationships Browser.


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