Giuseppe Castagna. Patterns and Types for Querying XML Documents. In Stéphane Bressan, Stefano Ceri, Ela Hunt, Zachary G. Ives, Zohra Bellahsene, Michael Rys, Rainer Unland, editors, Database and XML Technologies, Third International XML Database Symposium, XSym 2005, Trondheim, Norway, August 28-29, 2005, Proceedings. Volume 3671 of Lecture Notes in Computer Science, pages 1-3, Springer, 2005. [doi]