Roger Bamford Vinayak R. Borkar Matthias Brantner Peter M. Fischer Daniela Florescu David A. Graf Donald Kossmann Tim Kraska Dan Muresan Sorin Nasoi Markos Zacharioudaki XQuery Reloaded. 1342-1353 2009 2 PVLDB 2 http://www.vldb.org/pvldb/2/vldb09-1078.pdf db/journals/pvldb/pvldb2.html#BamfordBBFFGKKMNZ09