The following samples deal with Relational Language and Operational Mappings. Those are some of the samples from my books that should show some typical and representative model transformation techniques. I brought almost all of them to work, which is not that easy. So should you, and if not, don't hesitate to ask me. If they don't work, I mention why not. If anybody wants to learn more about QVT Relational and Operational and if he or she's German speaking, don't hesitate to buy my books. And English speaking folks, send me a message of your interest, if any.