It is based upon the UML2 2.0 framework of Eclipse and provides a type mapping from the UML 2.1 metamodel implementation to the Xpand type system. Hence one can access the whole UML2 metamodel from Check , Xtend , and Xpand . Additionally, and more important, the adapter dynamically maps stereotypes applied to model elements to Xpand types and tagged values to Xpand properties. You do not have to implement additional Java classes anymore. Just export your models and applied profiles. That's all!