title: qursed : querying and reporting semistructured data sigmod conference. authors: y papakonstantinou , m petropoulos , v vassalos. venue: nan. year: 2002.0
title: ozone : integrating structured and semistructured data s abiteboul , r goldman , t lahiri , j mchugh , j technical report , stanford university database group ,. authors: nan. venue: nan. year: nan