Basics of Use Case Diagramsīefore starting off today’s article, iti is worth revisiting the definition of use a case diagram, as described in the first article. Finally, you’ll see how to use case diagrams for the case study application-the Courseware Management System-used in the previous articles. Additionally, you will see what a use case specification is. We’ll present the basics of use case diagrams and show you how to draw a use case diagram. In this article, you’ll explore the Use case diagram. Now that you have the clear, you’ll start to learn about the the nine UML diagrams. In the previous two articles, you saw a brief review of the nine UML diagrams and what kind of tools can be used to model UML diagrams.