Class diagram

The UML class diagram (UML is a modelling language for designing applications) represents the static view of an application, being useful not only for visualising, describing and documenting different aspects of a system but for wiriting executable code of a planned software application. The class diagram presents the attirbutes and operations of a class for modelling object-oriented systems. Besides classes, class diagrams also depict interfaces, associations, collaborations and constraints. It is also known as a structural diagram. A class diagram can also describe the responsibilities of a system and serve as the basis for deployment and component diagrams. When drawing a class diagram, its name should be meaninhful to the system aspect it's describing, with each element and their relationship identified in advance.

Example of class diagram. retrieved from <https://www.tutorialspoint.com/uml/uml_class_diagram.htm>