Research On Ontology Construction Method Based On Relational Database

Ontology as a semantic and knowledge in the knowledge level description of the concept of system models and modeling tools, the knowledge engineering has been widely used and effective to solve the knowledge engineering in the development of two major obstacles: the reuse of knowledge and knowledge sharing. At present, most or manually constructed ontology editing, and not a standard construction method. However, the traditional manual method of constructing the body only a few experts to master, and in the course of constructing ontology library needs a lot of manual search, input, instance, etc., is a complex and error-prone work, leading to the ontology construction period, high costs, a knowledge acquisition bottleneck. Thesis aims to find a database of resource utilization has some method of automatic ontology construction, improve the efficiency of ontology construction.In reality, information systems related areas have the background as a relational database support, relational database model is the early development of system personnel in the system requirements analysis through a number of areas obtained. Therefore, the relational data model in fact implies a conceptual model related fields.Goal of this study is based on efficient and effective construction of a relational database contains a wealth of semantic information associated with the body, making the database to better share, reuse and interoperability, which is a database system from the "management data" to"managing knowledge" of the effective way. Therefore, this paper studied the extraction of information from the relational database directly to generate ontology using OWL language that way. This paper is based on existing relational database, in-depth analysis of the current relational database of several implicit semantic information lost in the process of the building contains a foreign key to recover semantic information, making the database more meaningful than complete. Then, according to the proposed relationship between semantic information model and the mapping between the OWL ontology model rules, including the concept of ontology mapping rules, ontology attribute mapping rules, the concept of the relationship between ontology mapping rules, ontology mapping rules and ontology axioms examples of mapping rules.In the above construction method under the guidance of the design and implementation of ontology construction based on relational database systems, relational database to store in the Middle School Student Management database system for the data source, in accordance with the relational model and the correspondence between OWL ontology, respectively, on how to generate set of ontology concepts, ontology attribute set, the relationship between the set of ontology concepts, ontology and ontology instance of the axiom set of a detailed description of instructions, through the analysis of experimental results verify the correctness and feasibility.