A Simple Game-Theoretic Approach to Checkonly QVT Relations

Abstract. The QVT Relations (QVT-R) transformation language allows the definition of bidirectional model transformations, which are required in cases where a two (or more) models must be kept consistent in the face of changes to either. A QVT-R transformation can be used either in checkonly mode, to determine whether a target model is consistent with a given source model, or in enforce mode, to change the target model. Although the most obvious semantic issues in the QVT standard concern the restoration of consistency, in fact even checkonly mode is not completely straightforward; this mode is the focus of this paper. We need to consider the overall structure of the transformation as given by when and where clauses, and the role of trace classes. In the standard, the semantics of QVT-R are given both directly, and by means of a translation to QVT Core, a language which is intended to be simpler. In this paper, we argue that there are irreconcilable differences between the intended se...

• Type: Conference
• Year: 2009
• Where: ICMT
• Authors: Perdita Stevens
• Keywords: Bidirectional Model Transformations, ICMT 2009, Obvious Semantic Issues, Programming Languages, Target Model