Database and Expert Systems Applications : 13th International Conference DEXA 2002 Aix en Provence France September 2–6 2002 Proceedings This book constitutes the refereed proceedings of the 13th International Conference on Database and Export Systems Applications DEXA 2002 held in Aix en Provence France in September 2002. The 89 revised full papers presented together with three invited papers and a position paper were carefully reviewed and selected from 241 submissions. The papers are organized in topical sections on Web workflow data warehouses and datamining applications XML distributed systems knowledge engineering advanced databases queries information retrieval and indexing