Stelios Paparizos Jignesh M. Patel H. V. Jagadish SIGOPT: Using Schema to Optimize XML Query Processing. 1456-1460 2007 conf/icde/2007 ICDE http://dx.doi.org/10.1109/ICDE.2007.369035 db/conf/icde/icde2007.html#PaparizosPJ07