UML Use Case Diagrams: Tips

Contents: What is a UML Use Case Diagram (UCD), and when should I use it? How do you know who the actors are in a UCD? How do you know what to put in the "System" box? The actors in my diagram have interactions. How do I represent them? I am trying to represent a sequence of actions that the system performs. How do I do it? How is a UML Use Case Diagram different from a traditional flow chart? When do I use the uses arrow? When do I use the extends arrow? What is the difference between uses and extends?

UML basics: The class diagram

Summary: from The Rational Edge: As the most important example of the new structure diagram type in UML 2, the class diagram can be used by analysts, business modelers, developers, and testers throughout the software development lifecycle. This article offers a comprehensive introduction.

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