This paper presents an efficient yet effective algorithm to hierarchically organize search results. Rather than using clustering technique, this paper employs domain ontology in order to obtain better hierarchical classification. Domain ontology defines information architecture in a specific domain. The hierarchical classification process consists of two stages. First, in off-line mode, a classifier is employed to determine category in ontology that is similar to a Webpage. Second, when processing a user’s search query, all search results are hierarchically categorized using the classification scheme provided in the metadata of retrieved documents
