TY - CHAP U1 - Konferenzveröffentlichung A1 - Gerhart, Markus A1 - Bayer, Julian A1 - Höfner, Jan Moritz A1 - Boger, Marko T1 - Approach to Define Highly Scalable Metamodels Based on JSON T2 - Proceedings of the 3rd Workshop on Scalable Model Driven Engineering part of the Software Technologies : Applications and Foundations 2015 Federation of Conferences, L'Aquila, Italy, July 23, 2015; CEUR Workshop Proceedings ; Vol. 1406 N2 - Domain-specific modelling is increasingly adopted in the software development industry. While open source metamodels like Ecore have a wide impact, they still have some problems. The independent storage of nodes (classes) and edges (references) is currently only possible with complex, specific solutions. Furthermore the developed models are stored in the extensible markup language (XML) data format, which leads to problems with large models in terms of scaling. In this paper we describe an approach that solves the problem of independent classes and references in metamodels and we store the models in the JavaScript Object Notation (JSON) data format to support high scalability. First results of our tests show that the developed approach works and classes and references can be defined independently. In addition, our approach reduces the amount of characters per model by a factor of approximately two compared to Ecore. The entire project is made available as open source under the name MoDiGen. This paper focuses on the description of the metamodel definition in terms of scaling. Y1 - 2015 UR - http://ceur-ws.org/Vol-1406 SN - 1613-0073 SS - 1613-0073 SP - 11 EP - 20 ER -