Abstract
The paper analyses and compares the different approaches to achieve semantic interoperability of the most influential IoT reference architectures, namely the Industrial Internet Reference Architecture, Reference Architecture Model Industrie 4.0, ISO/IEC Internet of Things Reference Architecture, the Internet of Things – Architecture (IoT-A) and oneM2M functional architecture.
Zusammenfassung
Dieser Beitrag betrachtet und vergleicht die verschiedenen Ansätze zur Umsetzung semantischer Interoperabilität der einflussreichsten IoT Referenzarchitekturen. Betrachtet werden die Industrial Internet Reference Architecture, das Referenzarchitekturmodell Industrie 4.0, die ISO/IEC Internet of Things Reference Architecture, die Internet of Things – Architecture (IoT-A) sowie oneM2M.
About the authors

Head of the group “Modeling and System Networking” at the Fraunhofer IOSB, Karlsruhe; Research topics are Middleware Development and Semantic Modelling.
Fraunhofer IOSB, Fraunhoferstr. 1, 76131 Karlsruhe, Germany, Phone +49 (0) 721 6091 294

Research associate “Information Management and Production Control” at Fraunhofer IOSB Karlsruhe. Research topics: Internet of Things, Semantic Web, Semantic Stream Processing, Interoperability
Fraunhofer IOSB, Fraunhoferstr. 1, 76131 Karlsruhe, Germany, Phone +49 (0) 721 6091 470

Leader of the “Internet of Things Laboratory” at the Faculty of Electrical Engineering and Computing, University of Zagreb, Croatia. Current research topics: Internet of Things platforms, Mobile Crowd Sensing, Data Stream Processing and Publish/Subscribe Middleware.
University of Zagreb Faculty of Electrical Engineering and Computing, Zagreb, Croatia, Phone +385 (0) 1 6129 761
Acknowledgement
This work is supported by the H2020 symbIoTe project, which has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 688156. The authors would like to cordially thank the entire symbIoTe consortium for their valuable comments and discussions.
©2016 Walter de Gruyter Berlin/Boston