Operation-based Model Differencing meets State-based Model Comparison

The computation of a difference between two models is the most basic function of model versioning tools. Two fundamental approaches to obtain model differences have been proposed: Operation-based differencing and state-based comparison. They are commonly regarded as disjoint and thus evolved mostly independent of each other. Recent advances in model comparison, which lift low-level differences to invocations of complex editing commands, brought both approaches closer together. The overall goal of the CVSM working session proposed in this paper is to analyse common challenges and to derive conceptual and tooling-related issues which offer the potential for future collaborations of researchers originating from working groups of both approaches.