Abstract: Ontology-Based Web Site Mapping for Information Exploration X. Zhu and S. Gauch and L. Gerhard and N. Kral and A. Pretschner A centralized search process requires that the whole collection reside at a single site. This imposes a burden on both the system storage of the site and the network traffic near the site. This argues that the search process should be distributed. Recently, more and more Web sites provide the ability to search their local collection of Web pages. Query brokering systems are used to direct queries to the promising sites and merge the results from these sites. Creation of meta-information of the sites plays an important role in such systems - it is used by the query brokers to identify appropriate sites to send each query. In this article, we introduce an ontology- based web site mapping method used to produce conceptual meta-information based. We present a series of experiments comparing our classification approach with Na"ive-Bayes approach, finding it more accurate. We also show how the automatically generated site map is used in distributed search, browsing and visualization in our multi-agent system, Obiwan.