UML Design Class Diagram

UML design class diagrams (DCD) show software class definitions. They are based on the collaboration diagram. Attribute visibility is shown for permanent connections. Classes are shown with their simple attributes and methods listed.

Some attributes are depicted using associations (relationships) rather than actually being listed in the class block. These associated attributes refer to complex objects which should also be shown in the diagram. The collaboration diagram indicates methods to be contained in a class with methods posted as relationships. For instance the Schedule class has a findSeat(route, preference) method.

UML Package Diagram

UML Packages are a grouping of objects into sets of objects that provide related services. The package has responsibilities that are strongly related. The package has low coupling and low cohesion with respect to interfacing with other packages in the system.