• Title/Summary/Keyword: 스키마 통합

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An Efficient Algorithm for Clustering XML Schemas (XML 스키마 클러스터링을 위한 효율적인 알고리즘)

  • Rhim Tae-Woo;Lee Kyong-Ho
    • Journal of Korea Multimedia Society
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    • v.8 no.7
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    • pp.857-868
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    • 2005
  • Schema clustering is important as a prerequisite to the integration of XML schemas. This paper presents an efficient method for clustering XML schemas. The proposed method first computes similarities among schemas. The similarity is defined by the size of the common structure between two schemas under the assumption that the schemas with less cost to be integrated are more similar. Specifically, we extract one-to-one matchings between paths with the largest number of corresponding elements. Finally, a hierarchical clustering method is applied to the value of similarity. Experimental results with many XML schemas show that the method has peformed better compared with previous works, resulting in a Precision of $99\%$ and a rate of clustering of $93\%$ in average.

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Integration of Secure Distributed Object-Oriented Database Schemas (보안 분산 객체지향 데이타베이스 스키마의 통합)

  • Park, U-Geun;No, Bong-Nam
    • The Transactions of the Korea Information Processing Society
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    • v.2 no.5
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    • pp.645-654
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    • 1995
  • A distributed DBMS integrates local schemas that are independently designed, maintained, and managed by different users at each site providing a global virtual schema. This global schema supports users at a specific site to transparently utilize local database at different sites. The security features of the local schema should also not be changed in the global schema integrating security features of each local schema. Researches on the integration of security features into local schema in distributed DBMS environment, however, are very rate. This pater using the multilevel secure object-oriented database model(as the model for the definition of a local schema in distributed environment) which is an extension of the object-oriented models. It also suggests eight integration methods that can maintain the security features of local schemas. The eight methods are classified by the object classes and by relationships among them.

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An XML Schema-based Semantic Data Integration (XML Schema기반 시맨틱 데이타 통합)

  • Kim Dong-Kwang;Jeong Karp-Joo;Shin Hyo-Seop;Hwang Sun-Tae
    • Journal of KIISE:Computer Systems and Theory
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    • v.33 no.9
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    • pp.563-573
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    • 2006
  • Cyber-infrastructures for scientific and engineering applications require integrating heterogeneous legacy data in different formats and from various domains. Such data integration raises challenging issues: (1) Support for multiple independently-managed schemas, (2) Ease of schema evolution, and (3) Simple schema mappings. In order to address these issues, we propose a novel approach to semantic integration of scientific data which uses XML schemas and RDF-based schema mappings. In this approach, XML schema al-lows scientists to manage data models intuitively and to use commodity XML DBMS tools. A simple RDF-based ontological representation scheme is used for only structural relations among independently-managed XML schemas from different institutes or domains We present the design and implementation of a prototype system developed for the national cyber-environments for civil engi-neering research activities in Korea (similar to the NEES project in USA) which is called KOCEDgrid (http://www.koced.net).

A Unified Modeling Methodology Development For In Application based on Relational Database using UML (UML 클래스을 이용한, 관계형 데이터베이스 기반의 XML 응용을 위한 통합 모델링 개발)

  • 방승윤;주경수
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.10c
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    • pp.61-63
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    • 2002
  • 본 논문에서는 UML을 이용하여 W3C XML Schema를 설계하기 위한 XML 모델링 방안을 제시하고, 아울러 교환되는 XML 데이터를 효율적으로 저장하기 위하여 관계형 데이터베이스 스키마 설계를 위한 통합 설계 방법론 제안한다. 또한 통합 설계 방법론의 객관적인 검증을 위하여, 기존의 Ronald Bourret의 방법을 사용하여 XML schema를 객체 모델로 변환하고 아울러 변환된 객체 모텔을 관계형 데이터베이스 스키마로 변환된 결과와 본 논문에서 제시한 UML를 이용한 데이터 모델링에 따른 관계형 데이터베이스 스키마와의 상호 일치함을 보임으로써 본 논문에서 제안한 통합 설계 방법론의 객관성을 검증하였다.

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Schema Conflict Resolution Method on Content Integration Management System (컨텐츠 통합 관리 시스템에서의 스키마 충돌 해결 방안)

  • Lee Jung-hwa;Kwon Oh-jun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.5
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    • pp.1132-1141
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    • 2005
  • We must have a schema conflict resolution method for integrating local schema on content integration and management system. But The Past method is inconsistent and depends on local and global databases. In this paper, we propose the management method of schema confilct using XML that can represent and interchange the structual information of schema.

Management of Schema Conflict on Content Integration and Mangement System (컨텐츠 통합 관리 시스템에서의 스키마 충돌 처리)

  • 이중화;문경희;윤흥원
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2004.05b
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    • pp.370-373
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    • 2004
  • We must have management method of schema conflict for integrating local schema on content integration and management system. But The past method is inconsistent and depends on local and global databases. In this paper, we propose the management method of schema confilct using XML that can represent and interchange the structual information of schema

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Control of metadata schema conflicts for internet datawarehouse (인터넷 데이터웨어하우스 구축을 위한 메타데이터 스키마 충돌 제어)

  • Kim, Byung-Gon
    • Journal of Digital Contents Society
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    • v.8 no.4
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    • pp.499-507
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    • 2007
  • With the increasing of users' request about internet web service, importance of Internet datawarehouse to support decision making of users is increasing now. Early Internet datawarehouse was studied in the form of using existent database and XML. However, because of limitation of information expression ability, it is gradually changed to system that use metadata schema like RDFS. Because of distributed environment of the Internet, integration and saving of each metadata schemas into one global schema is important. However, between each different schema, semantic and structural conflicts can be happen in such situation and they must be controlled. In this paper, we analyze occasions of conflict when integrate distributed metadata schemas and propose conflict resolution technique for efficient internet datawarehouse query processing.

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Attribute and is-a Relationship for Unification of Converting Rule on Database Schema (데이터베이스 스키마 전환규칙 통합을 위한 속성 및 is-a관계)

  • Kang, Byung-Young;Park, Chul-Jae
    • Proceedings of the Korea Information Processing Society Conference
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    • 2002.04a
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    • pp.117-120
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    • 2002
  • 본 논문에서는 객체지향 데이터베이스 스키마 전환 규칙 통합을 위한 속성, is-a 관계 및 예외처리를 정의하였다. 개념적모델(ER모델)에서 객체지향 스키마로 전환하는 규칙을 확장하여 개발하였으며 다중상속 문제나 예외처리와 같은 스키마의 변경에 대한 규칙도 제시한다. 객체지향 데이터베이스의 개념적모델을 전환하는 규칙을 정립함으로서 이미 생성된 정보를 활용할 수 있으며, 데이터베이스와 지식베이스를 결합하려는 시도에도 활용할 수 있다.

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Comparison and Analysis of Science and Technology Journal Metadata (해외 과학기술 학술논문 메타데이터의 비교 분석)

  • Lee, Min-Ho;Lee, Won-Goo;Yoon, Hwa-Mook;Shin, Sung-Ho;Ryou, Jae-Cheol
    • The Journal of the Korea Contents Association
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    • v.11 no.9
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    • pp.515-523
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    • 2011
  • It is important to manage large amount of information from various information providers for supporting recent information services such as providing global research trends, detecting emerging signal and listing leading researchers. For integrated management, definition of integrated metadata schema, data transformation and schema matching are needed. It is first necessary to analyze existing various metadata for defining integrated metadata schema. In this paper, we have analyzed several metadata of scientific journal papers by classifying semantics, content rules and syntax, and looked around considerations to make integrated schema or transform metadata. We have known that XML is used as a syntax for supporting convenience and various usage condition, and hierarchy element names and common elements in semantics are needed. We also have looked at elements having various content rules and related standards. We hope that this study will be used as basic research material of metadata integrated management, data transform and schema matching for interoperability.

An XML Schema Manager based on the XML View in a Storage Wrapper (자료 저장소 랩퍼에서 XML 뷰 기반의 XML 스키마 관리 시스템)

  • 정무장;박진수;정채영;이미영;강현석
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.04b
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    • pp.22-24
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    • 2002
  • 미디에이터 기반의 데이터베이스 통합 방법론에서 랩퍼는 미디에이터에게 지역 데이터베이스의 스키마들 전달해야 한다. 여기서는 지역 데이터베이스의 스키마를 XML 스키마로 변환하여 미디에이터에게 전달하는 랩퍼 시스템에서의 스키마 관리기에 대하여 논한다. 이를 위하여 관계형 모델의 지역 데이터베이스에서, 지역 데이터베이스 스키마를 XML 스키마로 변환할 때 고려할 사항을 논한다 그리고 XML 질의어인 XQuery로 XML 뷰 정의 언어를 사용할 때, XQuery로 표현된 XML 뷰를 XML Schema로 표현된 XML 스키마로 변환하는 방법을 제시한다.

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