title: constraints for semi-structured data and xml. authors: wenfei fan , peter buneman , scott weinstein , jérôme siméon. venue: sigmod record. year: 2001
title: constraints for semistructured data and xml. authors: peter buneman , wenfei fan , j &#233; r &#244; me sim &#233; on , scott weinstein. venue: acm sigmod record. year: 2001