Andrei Arion Véronique Benzaken Ioana Manolescu Yannis Papakonstantinou Ravi Vijay Algebra-Based Identification of Tree Patterns in XQuery. 13-25 2006 conf/fqas/2006 FQAS http://dx.doi.org/10.1007/11766254_2 db/conf/fqas/fqas2006.html#ArionBMPV06