At this year's MODELS Conference in Copenhagen, the Chair of Business Information Systems and Enterprise Modelling presents various papers in the field of multi-level modelling. Prof. Frank and Tony Clark will jointly present the current status of multi-level constraints, which are similar to OCL but can be applied to multiple levels of a model. At the MULTI Workshop Prof. Frank will present specific requirements before Mario Nolte will report on practical experiences in multi-level modeling, which he made together with Monika Kaczmarek-Heß in a cooperation project with colleagues from the University of Karlsruhe and the University of Furtwangen. Jens Gulden presents his research on possibilities of mapping several layers with XML, before Daniel Töpel shows possibilities how restrictions can be eliminated by a strict multi-level modelling.