Model Transformations Incorporating Multiple Views

Model transformations are an integral part of OMG’s standard for Model Driven Architecture. Model transformations are advocated to be behaviour preserving: platform specific models should adhere to platform independent descriptions developed in earlier design stages. In this paper, we deal with models consisting of several views of a system. Often, in such a scenario, model transformations change just one view, and, although the overall transformation of all views is behaviour preserving, it is not behaviour preserving in isolation. To tackle this problem we develop a proof technique (and show its soundness) that allows one to consider just the view that has changed, and not the entire system. We focus specifically on one particular class of view-crossing transformations, namely on transformations conjunctively adding new constraints to a model.