Diagramme de classes : Overview
Element and ModelElement are the most abstract classes of the metamodel. Almost any metaclass is a model element, except some classes that do not require a name. Graphical classes (e.g. Point ...) are separated from the “semantic" metamodel, and do not inherit from “Element". NameSpaces play a particular role in the structure of a model. The static model is organized around that metaclass. The Objecteering metamodel is constrained on single inheritance.