Zohra Bellahsene Akmal B. Chaudhri Erhard Rahm Michael Rys Rainer Unland Database and XML Technologies, First International XML Database Symposium, XSym 2003, Berlin, Germany, September 8, 2003, Proceedings XSym Lecture Notes in Computer Science 2824 Springer 2003 3-540-20055-X db/conf/xsym/xsym2003.html