The Study On Thesaurus-based Construction Of Medical Domain Ontology

Since the development of computer and Internet technology, the Sources of information have changed fundamentally, web has become an important source of information people can acquire. With the massive increase and disorder of information on the web, people really need to get their information has become no longer easy. To enable the computer to recognize the meaning of the data to help users find the information, semantic web came into being, it makes the network with semantic information, the computer can be understood. The ontology is the key to realization of the semantic web.The current research and application of ontology is developed very fast, Ontology as the tools can be described on semantic and knowledge levels of a conceptual model of information system, arouse the attention of experts in the field. On 20th century90 years, people introduced the conceptof the ontology into knowledge management, artificial intelligence and library and information science and so on, and in these areas, ontology as an organizational system, representation and organization of knowledge. National Library and Information Studies on the ontology is still in its infancy, both in theoretical research, empirical research, or in the technical means of implementation and application are relatively backward, and it lags far behind foreign.This paper describes the status of home and abroad research on the ontology, discuss the theory of the ontology, elaborate thesaurus,ontology and their connection and how to build ontology using thesaurus are described, specifically the method of construction of ontology。This test based on the ontology model, drawing on Stanford' seven-step method, using the medical subject headings for the test about cardiac arrhythmia diseases Ontology of medical field. According to constructing a medical ontology, understand the process of building the domain ontology, provides an example for ontology theory application in the medical field. We grasp initial the language of the ontology, acquire inquiry function, comply the retrieval of concept and improve search precision, and finally make intelligent retrieval come true.The significance of this paper elaborate ontology technology, theory and methods comprehensively and systematic, through the design and build the ontology model and its retrieval, through the design and build the ontology model and its retrieval, verify the ontology with intelligent search functions, and it will be introduced into medical library and information field, wishes to promote applications and development of the ontology in the medical information retrieval, medical expert system, Telemedicine system the field of medical education systems and so on.