QVTs: A TGG-like graphical representation for e cient Declarative Model to Model Transformation scheduling

Graph Grammars have been providing an increasingly sound foundation for Graph Transformation for nearly 50 years. 20 years ago, the enthusiasm surrounding the Model Driven Architecture motivated the OMG to start standardization of the QVT Model to Model transformation language. Sadly, the M2M work ignored the considerable overlap with GT and is much the worse for it. This paper shows how a graphical approach can resolve many of the M2M challenges and hopefully start to bridge the gap between the GT and M2M communities.