(SPEM), and the Common Warehouse Metamodel (CWM). Note that the term "architecture" in Model Driven Architecture does not refer to the architecture of the system being modeled, but rather to the architecture of the various standards and model forms that serve as the technology basis for MDA.

Executable UML was the UML profile used when MDA was born. Now, the OMG is promoting fUML, instead. (The action language