Denilson Barbosa Angela Bonifati Zohra Bellahsene Ela Hunt Rainer Unland Database and XMLTechnologies, 5th International XML Database Symposium, XSym 2007, Vienna, Austria, September 23-24, 2007, Proceedings XSym Lecture Notes in Computer Science 4704 Springer 2007 978-3-540-75287-5 db/conf/xsym/xsym2007.html