시맨틱 웹은 지식을 구조적으로 표현할 수 있는 수단과, 논리를 기반으로 지식을 처리하는 기술을 주요 요소로 포함하고 있다. 후자에 대한 유력한 기술로 기호 논리를 기반으로 한 연역 추론 기법이 폭넓게 응용되고 있으나 아직 초보적인 단계에 머물러 있다. 본 논문은 시맨틱 웹 환경에서 효과적인 추론 기능을 수행할 수 있는 연역 추론 시스템의 설계 및 구현 내용을 담고 있다. 본 논문에서 제시하는 추론 시스템은 표준 기술 논리(Description Logic)의 상당 부분과 혼 논리(Horn Logic) 기반의 논리 프로그래밍을 아우르는 확장된 표현력을 제공하여, RETE 알고리즘 기반의 생성 시스템을 활용하여 추론한다. 또한, 규칙베이스를 구성하는 단위 지식들을 웹 자원화함으로써 온톨로지로 대표되는 시맨틱 웹의 지식 표현력을 확장하였다. 본 논문이 제시하는 추론 시스템을 이용하면 웹 온톨로지 위에 규칙 및 논리 계층[1]을 효과적으로 구현할 수 있다.
KSP Keywords
Description Logic(DL), Horn logic
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