title: an xml-based wrapper generator for web information extraction david buttler , wei tang , calton pu , wei han , ling liu sigmod conference. authors: nan. venue: nan. year: 1999.0
title: an xjml-based wrapper generator for web information extraction ling liu , wei han , david buttler , calton pu , wei tang 1999. authors: nan. venue: international conference on management of data. year: nan