ADBIS 2010 : Local Proceedings of the 14 th East-European Conference on Advances in Databases and Information systems Novi Sad, Serbia, September 20-24, 2010 - Ivanovic, Mirjana; Thalheim, Bernhard; Catania, Barbara; Budimac, Zoran (Fakulty of Sciences University of Novi Sad, 2010)