Reasoning Web. Semantic Technologies for the Web of Data : 7th International Summer School 2011, Galway, Ireland, August 23-27, 2011, Tutorial Lectures - Axel Polleres, Claudia d.Amato, Marcelo Arenas, Siegfried Handschuh, Paula Kroner, Sascha Ossowski, Peter Patel-Schneider ((Lecture Notes in Computer Science))