UML and OCL Transformation Model Analysis: Checking Invariant Independence

Abstract. This paper discusses a case study for showing invariant independence for a transformation model. The study is based on an approach that proposes to analyze UML and OCL models using a solver for relational logic. In the approach, UML and OCL models describe system structures formally with UML class diagrams and OCL class invariants. Test cases in form of object diagrams are constructed and employed for property inspection. With the approach one can prove model properties like model constraint independence for the structural model part. Thus important model properties can be analyzed on the modeling level without the need for implementing the model. All feedback given to the developer is stated in terms of the used modeling language, UML and OCL