A method, computer program product and system for creating class diagrams of user interfaces of applications. A modeling language such as UML V2.0 may be used to create class diagrams through a graphical editor, create new model elements derived from existing ones such as stereotypes for creating a comprehensive class diagram for the user interface. The class diagram for the user interface is based on a limited number of stereotyped classes for pages, views in the pages of the user interface, operations in the view classes and class for services triggered by the operations. The user interface class diagram is attached to the application class through the classes of the application for data manipulated by the user interface. A sequence diagram reflecting the correlation between view operation and services is also created to complete the description of the user interface.