Validating Query/View/Transformation Relations

Model-based software engineering is an increasingly applied method in producing software artifacts that is driven by model transformation. For example, Model-Driven Architecture (MDA) is an approach to develop software based on different models. Source code is generated automatically from these models. This makes model transformations the heart of MDA and other model-based software engineering approaches. Query/View/Transformation (QVT) is a transformation technology aimed solving model transformation challenges. There is a demand for making model transformation more flexible, efficient, highly-configurable as well as validated. For graph rewriting-based model transformations, we have developed an approach to support online validation of model transformations. This approach has been implemented in Visual Modeling and Transformation System (VMTS). Furthermore, VMTS has a QVT plug in supported with a QVT Toolkit to execute QVT Relations-based transformations. This paper discusses the details applying the online validation approach to model transformation rules defined in the QVT Relations language.