Andrew Eisenberg Jim Melton Advancements in SQL/XML. 79-86 2004 33 SIGMOD Record 3 http://doi.acm.org/10.1145/1031570.1031588 http://www.acm.org/sigmod/record/issues/0409/11.JimMelton.pdf db/journals/sigmod/sigmod33.html#EisenbergM04a