Advances in Web Mining and Web Usage Analysis : 7th International Workshop on Knowledge Discovery on the Web, WEBKDD 2005, Chicago, IL, USA, August 21, 2005, Revised Papers - Olfa Nasraoui, Osmar Zaïane, Myra Spiliopoulou, Bamshad Mobasher, Brij Masand, Philip S. Yu ((Lecture Notes in Computer Science))