1. Applied Computing Group, University of Almería, Spain, javi.criado@ual.es
2. Data Engineering, Fraunhofer IESE, Germany, Silverio.Martinez@iese.fraunhofer.de
3. GESSI Research Group, Universitat Politècnica de Catalunya, Spain, dameller@essi.upc.edu
4. Applied Computing Group, University of Almerèa, Spain, Luis.Iribarne@ual.es
5. Applied Computing Group, University of Almería, Spain, npadilla@ual.es
6. Data Engineering, Fraunhofer IESE, Germany, andreas.jedlitschka@iese.fraunhofer.de