This book constitutes the refereed proceedings of the 15th International Conference on Knowledge Engineering and Knowledge Management, EKAW 2006, held in Podebrady, Czech Republic in October 2006.
The 17 revised full papers and 16 revised short papers presented together with 2 invited talks were carefully reviewed and selected from 119 submissions. The papers are organized in topical sections on knowledge acquisition, ontology engineering, ontology learning, ontology mapping and evolution, semantic search, user interfaces, knowledge discovery, semantics from networks and crowds, and applications.