Proc. of the European Web Mining Forum 2005. Berendt, Bettina, Hotho, Andreas, Mladenic, Dunja, Semerano, Giovanni, Spiliopoulou, Myra, Stumme, Gerd and van Someren, Maarten, eds. , Workshop at the 16th Europ. Conf. on Machine Learning (ECML'05) / 9th Europ. Conf. on Principles and Practice of Knowledge Discovery in Databases (PKDD'05) (2005). .