Journal of KIISE:Databases (한국정보과학회논문지:데이타베이스)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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The Query Optimization Techniques for XML Data using DTDs

DTD를 이용한 XML 데이타에 대한 질의 최적화 기법

  • 정태선 (서울대학교 컴퓨터공학부) ;
  • 김형주 (서울대학교 컴퓨터공학부)
  • Published : 2001.12.01
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Abstract

As XML has become and emerging standard for information exchange on the World Wide Web it has gained attention in database communities of extract information from XML seen as a database model. Data in XML can be mapped to semistructured dta model based on edge-labeled graph and queries can be processed against it Here we propose new query optimization techniques using DTDs(Document Type Definitions) which have the schema information about XML data. Our techniques reduce traditional index techniques Also, as they preserve source database structure, they can process many kinds of complex queries. we implemented our techniques and provided preliminary performance results.

XML이 웹상에서 정보 교환의 표준으로 채택되면서 XML을 데이타베이스의 데이타로 보고 정보를 추출하는 분야가 주목받고 있다. XML은 그래프 기반의 비정형 데이타(semistructured data) 모델 과 매우 비슷하기 때문에 XML 데이타를 그래프 기반의 비정형 데이타 모델로 매핑한 후, 이에 대하여 질의를 처리할 수 있다. 본 논문에서는 XML 데이타에 대하여 스키마 정보를 가지는 DTB(Document Type Definition)를 이용한 질의 최적화 기법을 제안한다. 제안하는 기법은 인덱싱 효과를 내면서도 기존 방법에 비하여 부가의 메모리를 적게 필요로하고, 입력 데이타의 구조를 그대로 유지하기 때문에 다양한 형태의 질의를 효율적으로 처리할 수 있다. 간단한 예제 데이타베이스에 대하여 제안하는 기법의 실험 결 과를 보였다.

Keywords

References

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