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