Advances in Web Age Information Management : 4th International Conference WAIM 2003 Chengdu China August 17 19 2003. Proceedings This book constitutes the refereed proceedings of the 4th International Conference on Web Age Information Management WAIM 2003 held in Chengdu China in August 2003. The 30 revised full papers and 16 revised short papers presented together with 2 invited contributions were carefully reviewed and selected from 258 submissions. The papers are organized in topical sections on Web; XML; text management; data mining; bioinformatics; peer to peer systems; service networks; time series similarity and ontologies; information filtering; queries and optimization; multimedia and views; and systems demonstrations