UML Diagrams continued

As we said, we continued making these god forsaken diagrams. But first, we forgot to mention that what we used to make these.

ArgoUML is the leading open source UML modeling tool and includes support for all standard UML 1.4 diagrams. It runs on any Java platform and is available in ten languages.

The Use Case Diagram 

The purpose of use case diagram is to capture the dynamic aspect of a system.

Use case diagrams are used to gather the requirements of a system including internal and external influences. These requirements are mostly design requirements. So when a system is analyzed to gather its functionalities use cases are prepared and actors are identified. Now when the initial task is complete use case diagrams are modelled to present the outside view.

So in brief, the purposes of use case diagrams can be as follows:

• Used to gather requirements of a system.
• Used to get an outside view of a system.
• Identify external and internal factors influencing the system.
• Show the interacting among the requirements are actors. (go.to.source)

The first Use Case Diagram for our application looks like this :

Next up: The class diagrams.