Design And Implementation Of Knowledge Management System Based On Ontology

Knowledge plays an increasingly important role in human's life after human society stepped into knowledge economy times from industrial economy times. The importance of knowledge management and knowledge management system was gradually realized by the industry. Nevertheless, current knowledge management system only simply stored knowledge content. Because the storage method did not contain any semantics, queries in knowledge library could only use the key word based retrieval technology. This technology failed to find out the relationship and implicit knowledge among knowledge. Therefore, how to effectively manage knowledge, and how to quickly and accurately find out the knowledge that people needed from a huge amount of knowledge become the current research hotspot. This thesis has done the following work based on this purpose:First, though the mapping between ontology description language's grammar form and the relational database's schema, this thesis designed a knowledge management systematic model that used ontology to organize and represent knowledge and stored the ontologies into relational database. In this model, the thesis designed a nearly perfect trigger to implement inference, by which the completeness of semantics in knowledge library can be maintained.Second, in order to quickly and effectively build knowledge management system, this thesis developed a visualized edit tool SKB based on this knowledge management system model. SKB not only gave developer a friendly GUI, but also could realize authority management in knowledge library.Third, this thesis designed a semantic search module SSE, this module brought the semantics into query mechanism, and mined implicit knowledge with the help of ontology's semantic rule. SSE not only to a greater extent guaranteed the knowledge been found by users were valuable knowledge, but also to a certain degree improved the precision and recall compared with traditional key word based search technology.Finally, after analyzing and collecting medical field information and the research on ontology's building rule and method, this thesis used SKB to build medical field ontology and queried the medical field's knowledge via SSE and got many comprehensive and useful knowledge, which again proved the effectiveness of the system. The knowledge management system built in this thesis not only realized the effective management and organization of knowledge, but also made good use of the knowledge library's knowledge. The system gained some research importance in both theoretical and practical aspects.