Research of the conceptual representing of documents based on light ontology

The traditional method of presenting a document in an Information Retrieval(IR) system is based on terms. As the the new words appear dramatically in the Internet era, this kind of method draws back the IR system's performance. This paper puts forward an approach by using the concepts of the ontology to present the documents. Constructing the Word-Concept(W-C) model and Concept-Document(C-D) model, we compute the relevance of word-word , word-concept and concept-document. They are used to determine which page is most relevant to the query. It is proofed to be more effective than prevenient.