Database and Expert Systems Applications 26th International Conference, DEXA 2015, Valencia, Spain, September 1-4, 2015, Proceedings, Part II - Chen, Qiming.; Chen, Qiming.; Hameurlain, Abdelkader.; Hameurlain, Abdelkader.; Toumani, Farouk.; Toumani, Farouk.; Wagner, Roland.; Wagner, Roland.; Decker, Hendrik.; Decker, Hendrik. (Springer International Publishing : Imprint: Springer, 2015)