SYSTEM AND METHOD FOR KNOWLEDGE EXTENSION AND INFERENCE SERVICE BASED ON DBMS

摘要

A system and a method for providing a knowledge extension/inference service based on a DBMS(DataBase Management System) are provided to commercialize a semantic web service by providing a stable and efficient framework, which generates knowledge with ontology, extends the knowledge through an extension rule, and provides an inference service by processing a query. A knowledge generator(10) generates knowledge represented in a triple(Subject-Predicate-Object) by using an ontology schema and instances. A knowledge extender(20) extends the generated knowledge by using a knowledge extension rule. An inference service provider(30) provides an inference service by using the extended knowledge, and converting and processing a user query. The knowledge generator includes an RDF(Resource Description Framework)/XML(eXtensible Markup Language) parser(11) outputting a parsing result by parsing the ontology schema into RDF/XML, a schema-tripe converter(12) performing schema-triple conversion of the parsing result, a DB-triple conversion rule generator(13) generating a DB-triple conversion rule by receiving the schema-triple and DB-class/NS(name space)-prefix mapping information, and a DB-triple converter(14). The DB-triple converter converts ontology instances into ontology instances stored in a URL(Uniform Resource Locator) server into instance triples by using the DB-triple conversion rule.