title: on supporting containment queries in relational database management systems. authors: c zhang , j naughton , d dewitt , q luo , g lohman. venue: sigmod conference. year: 2001
title: xml and relational database management systems : the inside story. authors: m rys , d chamberlin , d florescu. venue: proceedings of the 2005 acm sigmod international conference & hellip ; ,. year: 2005.0