6. Class diagrams

The class diagram is part of the logical model of the system and presents a static picture of the system.

For each system, not one but several class diagrams are built: it is possible that for each precedent or scenario it has its own. On one show the subsets of classes, combined in packages, and the relationship between them, on the other - display the same subsets, but with the attributes and operations of classes. For the presentation of the system, as many class diagrams are developed as needed.