title: storing and querying ordered xml using a relational database system sigmod conference. authors: i tatarinov , s viglas , k beyer , j shanmugasundaram , e shekita , c zhang. venue: nan. year: 2002.0
title: unisql/x unified relational and object-oriented database system 1994.0. authors: w kim. venue: sigmod conference ,. year: nan