Research on Ontology Based Information Retrieval Model

Lead ontology into field of information retrieval breakthrough limitation of retrieval based on keywords,and then provided foundation with improving precision and recall.we proposed ontology based information retrieval model,in this model,and we combined with KBs and classical vector-space algorithm.The part of information retrieval included solution for keywords,and we considered if it doesn′t exist input condition,we also offered another measure,namely semantic extending.This model is very reasonable to the structure of information retrieval,very important,it can increase the result of information retrieval.