title: infomaster : an information integration system arthur m. keller , michael r. genesereth , oliver m. duschka sigmod conference. authors: nan. venue: nan. year: 1997.0
title: www-udk : a web-based environmental meta-information system ralf kramer , ralf nicholai , arne koschel , claudia rolker , peter lockemann , andree keitel , rudolf legat , konrad tirm 1997. authors: nan. venue: acm sigmod record. year: nan