Research Of The Topic Search Service Based On Domain Ontology

The Internet has been an inseparably important tool in our life. In order to satisfy theusers to access information on the Internet resources, all sorts of search engine emerge as thetimes require, such as Google and Baidu, etc. But along with the information rapid expansionand information diversified development, the index-queried content of the traditional searchengines unceasingly expands. In the search results, the user has to hard find in a large numberof failure information and even the garbage information. Therefore, the search engines isdevelopping toward the specialized, personalized, intelligent direction. Topic search servicebased on domain ontology has become the development trend of information search.Topic search service can ensure the field information to completely collect and timelyupdated, avoid powerful "noise" when searching, and improve the efficiency of the inquiry. Inorder to describe the knowledge structure of the field, there is a variety of representation, themore popular practice adopts Ontology to describe. In this paper, the ontology knowledge arefirstly summarized. Then introduce the definition, composition, classification, descriptionlanguage of the ontology and the principles, methods and common ontology editing tools ofbuilding ontology.Select communication industry as a subject areas, according to its conceptand terminology, through ontology editing tool protégé establish its ontology model.According to the structure of the search service and the classification, put forward to thesystem architecture model of the topic search service based on the domain ontology. Make athorough analysis to build domain ontology, information processing of the search service,the design of the topic crawler and the index building. On this basis, using the ontology model,design the interface to meet the needs of users of the query to realize the standardizationprocessing and search expansion of the user search keywords, improve the precision rate andrecall ratio.