openArchitectureWare (oAW) is a modular MDA/MDD generator framework implemented in Java(TM). It supports parsing of arbitrary models, and a language family to check and transform models as well as generate code based on them. Supporting editors are based on the Eclipse platform. OAW has strong support for EMF (Eclipse Modelling Framework) based models but can work with other models, too (e.g. UML2, XML or simple JavaBeans) At the core there is a workflow engine allowing the definition of generator/transformation workflows. A number of prebuilt workflow components can be used for reading and instantiating models, checking them for constraint violations, transforming them into other models and then finally, for generating code.