Knowledge Engineering and Knowledge Management: Ontologies and the Semantic Web : 13th International Conference EKAW 2002 Sigüenza Spain October 1–4 2002 Proceedings This book constitutes the refereed proceedings of the 13th International Conference on Knowledge Engineering and Knowledge Management EKAW 2002 held in Siguenza Spain in October 2002. The 20 revised full papers and 14 revised short papers presented together with an invited contribution were carefully reviewed and selected from a total of 110 submissions. The papers address all current issues in knowledge processing and key ingredients for building the semantic web such as ontologies knowledge modeling and representation languages and tools knowledge management and knowledge acquisition