DBKDA 2015 The Seventh International Conference on Advances in Databases, Knowledge, and Data Applications ISBN: 978-1-61208-408-4 GraphSM 2015 The Second International Workshop on Large-scale Graph Storage and Management May 24 - 29, 2015 Rome, Italy DBKDA 2015 Editors Friedrich Laux, Reutlingen University, Germany Andreas Schmidt, Karlsruhe University of Applied Sciences | Karlsruhe Institute of Technology, Germany Maria Del Pilar Angeles, Universidad Nacional Autonoma de Mexico - Del Coyoacan, Mexico Kiyoshi Nitta, Yahoo Japan Research, Japan Iztok Savnik, Jozef Stefan Institute and University of Primorska, Slovenia 1 / 195