Figure 5.4 shows how classes are shown on a class diagram as boxes divided into three compartments.
The top compartment identifies the class: It contains the class's name along with an optional number and abbreviation (“key letters”). UML, as opposed to Executable UML, allows only for the class name.
A class may have a sequential number that provides the ordering for the descriptions. This is optional and some tools may provide an option to suppress its display.
A class may have a small abbreviation used as a shorthand to refer to the class, especially in class actions. By using the abbreviation, we can ...