UML2 supports profile modeling diagrams. This is supported inside Objecteering through the Objecteering MDA Modeler module. Profile diagrams are simplified class diagrams, representing the notions of profile and class. The designer references predefined UML metaclasses (from the UML2 metamodel), and models his profiles, stereotypes and tagged values. Once these simple models have been defined, they are packaged into MDA components, which can add behaviour and model transformation in Java, and define GUI extensions for Objecteering (menu entries, dialog boxes, and so on) using dedicated creation wizards. These MDA components, which appear in the form of zipped files that can be deployed in any Objecteering Modeler, specialize Objecteering models behavior and GUI. To create extensions, simply build the graphic model of the profiles and then package them in an MDA component. No programming is required.