• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2000년도 춘계학술발표논문집
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• pp.374-377
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• 2000

본 논문에서는 기존의 항만물류 EDI가 가진 문제점을 해결하기 위한 방안으로 제시된 XML/EDI 에 대해 살펴보고 항만 물류에 XML/EDI를 적용하기 위해 기존의 EDI 메시지를 XML Schema 로 변환하는 기법을 소개한다. XML 문서의 논리적 구조를 표현하는 방법은 크게 DTD(Document Type Definition) 와 XML Schema 의두 가지 방식이 있으며,k XML Schema 는 기존의 DTD 에 비해 다양한 데이터 타입의 지원, namespace 지원, open-ended 데이터 모델의 지원등 여러 장점이 있기 때문에 항만 EDI 메시지를 XML Schema 로 변환하면 DTD 로 변환하는 것에 비해 높은 표현력과 다양한 부가적인 처리를 지원할 수 있다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2002년도 봄 학술발표논문집 Vol.29 No.1 (B)
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• pp.10-12
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• 2002

XML이 널리 확산되면서 XML문서들을 관계형 데이터 베이스에 저장하기 위한 관계형 스키마의 생성이 더욱 중요해 지고 있다. 기존의 DTD기반 관계형 스키마 생성 기법은 XML Schema에 적용될 수 없는데, 그 이유는 XML Schema에는 다양한 데이터 타입, 상속, 다형성과 같은 DTD에 존재하지 않는 새로운 특징들이 많기 때문이다. 이 논문은 XML 문서들의 구조를 정의한 XML Schema로부터 자동으로 관계형 스키마를 생성해 내는 XHL Schema를 위한 관계형 스키마 자동생성기의 개관을 설명한다

• International Journal of Internet, Broadcasting and Communication
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• 제9권2호
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• pp.11-19
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• 2017

The growing use of XML markup language has made amount of heterogeneous. XML documents are widely available in the Web. As the number of applications that utilize heterogeneous XML documents grow, the importance of XML document extraction increases greatly. In this paper, we propose a XML schema conversion technique that converts reusable XML schema from XML documents. We convert the schema graph and we use the reusability pattern list. The converted XML schema is evaluated in terms of cohesion, coupling, and reusability. The converted XML schema could be used to construct databases for various fields where XML is used as an intermediation of data exchange.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.1482-1485
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• 2005

An equivalent schema matching among several different source schemas is very important for information integration or mining on the XML based World Wide Web. Finding most similar source schema corresponding mediated schema is a major bottleneck because of the arbitrary nesting property and hierarchical structures of XML DTD schemas. It is complex and both very labor intensive and error prune job. In this paper, we present the first complex matching of XML schema, i.e. XML DTD, inlining two dimensional DTD graph into flat feature values. The proposed method captures not only schematic information but also integrity constraints information of DTD to match different structured DTD. We show the integrity constraints based hierarchical schema matching is more semantic than the schema matching only to use schematic information and stored data.

• 한국정보처리학회논문지
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• 제6권3호
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• pp.553-561
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• 1999

The facility of schema evolution is necessary in object-oriented database applications. There exist several versions of schema and instances created under different versions of the schema concurrently in the database. This base proposes a mechanism for supporting accessing instances regardless of versions of the schema in schema evolution environments in object oriented databases. There is trade-off between the flexibility of schema modification operations and the system overhead for supporting such schema modifications. Access handling routines are provided to the undefined attributes in each version of the class. Access handling routines are also defined for each pair of semantics rather than defining backdate/update functions for each pair of versions of a class. Thus, this mechanism supports the change of semantics with reduced user and system overhead.

• 한국BIM학회 논문집
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• 제11권3호
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• pp.67-74
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• 2021

An IFC file is dependent on the IFC schema. Because of this relationship, most IFC-using software reads and interprets the IFC File by employing an early binding method, which uses a standard IFC schema. In the case of most open sources, early binding methods using standard IFC schema have a problem that they cannot express extra information of IFC File out of extended IFC schema. Also, in the case of previous studies, they suggested schema extension, such as adding attribute information to the schema, rather than the interpretation of IFC File. This study research on method of extracting shape and attribute information was conducted by analyzing the IFC File produced through the Port schema, which is an extended IFC schema. Three objects were created using the reference relationship between the Port schema definition and the IFC entity, and, at the end, the three objects were combined into one object. It has been confirmed that the shape and property data were express properly while delivering the combined object to the viewer. The process is possible because of the method of matching IFC schema and IFC File, which is dependent on IFC schema but not early binding method. However, this method has some drawbacks, such that contemporaneously generated many objects consume many memory spaces. Future research to investigate that issue further is needed.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2005년도 춘계 학술발표회 논문집
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• pp.680-687
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• 2005

This study presents a schema matching technique which can be applied to XML semantic model of structural calculation reports of steel-box bridges. The semantic model of structural calculation documents was developed by extracting the optimized common elements from the analyses of various existing structural calculation documents, and the standardized semantic model was schematized by using XML Schema. In addition, the similarity measure technique and the relaxation labeling technique were employed to develop the schema matching algorithm. The former takes into account the element categories and their features, and the latter considers the structural constraints in the semantic model. The standardized XML semantic model of steel-box bridge's structural calculation documents called target schema was compared with existing nonstandardized structural calculation documents called primitive schema by the developed schema matching algorithm Some application examples show the importance of the development of standardized target schema for structural calculation documents and the effectiveness and efficiency of schema matching technique in the examination of the degree of document standardization in structural calculation reports.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 춘계종합학술대회
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• pp.285-288
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• 2003

기존에 구축된 전자상거래 및 e-Business 분야에서 사용된 XML(extensible Markup Language) 문서는 DTD(Document Type Definition)에 기반하여 작성되었다. 그러나 2001년 5월 XML 스키마(XML Schema)가 W3C에서 Recommendation이 된 이후 많은 XML 응용들이 XML 스키마를 기반으로 개발되는 실정이다. 이와 관련된 대표적인 것으로 ebXML Registry 2.0에서 XML 스키마를 채택하였다. XML 스키마를 개발하면 기존의 DTD를 사용하여 개발할 때에 비해 네임스페이스나 객체지향 개념 등으로 인하여 복잡도가 증가하고 있으며, 다양한 방법으로 코딩을 할 수 있게 되었다. 이에 본 논문에서는 ebXML 프레임워크에서 사용되는 XML 스키마 문서를 효율적으로 저작 및 편집 할 수 있는 사용자 인터페이스를 제공하는 XML 스키마 문서편집 시스템에 관한 연구를 하였다.

• 정보관리학회지
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• 제31권2호
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• pp.41-56
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• 2014

최근 연구데이터가 국가자산이라는 인식의 확산으로 원시데이터 관리 및 재사용의 필요성이 이슈이다. 본 연구에서는 데이터의 체계적인 관리를 위해, 스키마 클래스를 상속하는 방식의 메타데이터 설계 모델과 상속을 통해 생성된 스키마 객체들을 대상으로 메타데이터 통합 검색 모델을 제안하였다. 스키마 클래스를 상속한 스키마 객체가 데이터 컬렉션에 1대1의 관계를 갖도록 데이터 아키텍처를 설계하였으며, 제안된 모델의 검증을 위해서 가상 스키마 클래스 및 객체가 시스템적으로 구현 가능함을 증명하였다. 본 연구에서 제안하는 스키마 클래스 상속 및 통합검색 모델은 일반적으로 사용되는 '하향식 계층 모델'의 단점을 극복하는 모델로서, 정부 기관에서 생산되는 데이터를 독립적으로 관리하는데 활용될 수 있다고 사료된다.

• 한국실내디자인학회논문집
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• 제14권3호
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• pp.122-129
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• 2005

The purpose of this study aims at the development of architectural design thinking which has been studied in the Kant's Epistemology to examine the Schema theories. In this point of view, the related theories are reviewed through Expression Form, representation of architectural knowledge and so on. One of these words, the Schema that formed by transcendental an Experience and Memory of transcendental an Experience, not only Play an important Part in the designer's thinking system about a specific problem but also appeared by distinctive features(image) and included by connotation as like a designer's ideology. Speaking briefly, thinking of a designer familiar with us as abstract confusion can be confined such methodological tools as schema, and image, etc., which we can easily understand the relationship among them through mechanism of Kant's [Concept-Schema-Intuition]. Evidences collected from case studies and its application on architectural design yield following results. First, design thinking can be defined as Kant's Epistemology composed of the schema and its extended factors(architectural-schema). Second, design thinking can be revealed different characteristics depending on the degree of the schema and architectural-schema. Lastly, the methodology will be proposed after application of the result to architects' works.