A method of displaying a class and its attributes in a reasonably language-independent fashion. A class diagram is divided into compartments; the name of the class appears in bold type in the top or name compartment, and the attributes of the class, its values, are given in the bottom compartment, the attributes compartment.

A UML diagram that forms part of the static model of a system. It shows the relationships between the classes in the system, and notates the properties and behaviours of those classes. A class diagram may be used for a domain model or a design model.