Model of information retrieval system based on ontology

Aimed at the weakness of the Keyword-based search,an ontology-based information retrieval model was presented.This model is combined the information retrieval approach with semantic web technology and,on the basis of ontology-based knowledge base,achieved some semantic query to file repositories.Meanwhile,comprehensively considering both semantic and keyword-based search,a similarity measuring algorithm was proposed,so that the system could effectively meet the requirements of information searching of users and laid a theoretical basis for the research on the semantic search.