A research on theme correlation of Vertical search engine based on ontology

The information demands of the domain users depend on the whole quantity of information of the domain ontology, and the whole quantity of information of the domain ontology is invariableness. So information search according to the domain ontology can lock the whole quantity of information of the domain ontology effectively, also can shorten the information distance. This paper introduced characters of Vertical search engine; analyzed theme spider based on VSM, and presents a construction method of theme correlation of vertical search engine based on Ontology. Finally a vertical search engine of HR was designed and the process flowchart of web spider was given.