Database Systems for Advanced Applications : 15th International Conference, DASFAA 2010, International Workshops: GDM, BenchmarX, MCIS, SNSMW, DIEW, UDM, Tsukuba, Japan, April 1-4, 2010, Revised Selected Papers - Masatoshi Yoshikawa, Xiaofeng Meng, Takayuki Yumoto, Qiang Ma, Lifeng Sun, Chiemi Watanabe ((Lecture Notes in Computer Science))