• Journal of the Institute of Electronics Engineers of Korea CI
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• v.45 no.6
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• pp.147-153
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• 2008

Talking about reliability of I-commerce, the security services such as data integrity and non-repudiation are the most crucial elements. This thesis implemented the real estate contract digital signature system that makes this real estate E-commerce Possible. The technical background used in this thesis for the security services is XML (extensible Markup Language) signature technique, which is a signature technique that applies XML on the existing digital signature algorithm. The advantage of using XML signature technique is that it is very efficient since signing for the partial data is possible, and it is easy to apply to the XML-based I-commerce system which is most commonly used.

• Proceedings of the Korea Contents Association Conference
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• 2004.05a
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• pp.335-341
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• 2004

HTML that is language that web technology is center expression these day that use of internet and quantity of information by fast development increase rapidly brought limit to use information of web and XML that express meaning or corelation of data itself in W3C by standard for free document transmission and exchange in World Wide Web by the alternative as long as is deviation appeared. There is many efforts to use storing this XML document in RDBMS but to relation style DB because XML document is tree structure structurally data SQL and perfect disaster caused by things that is language to ask a question accomplish. In this paper XML document XML informations that is stored to RDBMS via Parsing and DOM tree process SQL quality through converter called XQuery2SQL of by change and embody XQuery2SQL conversion algorithm that draw information in RDBMS.

• Journal of Korea Multimedia Society
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• v.11 no.8
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• pp.1043-1050
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• 2008

XML has become a standard for data representation and exchange on the Internet. With a large number of XML documents on the Web, there is an increasing need to automatically process those structurally rich documents for information retrieval, document management, and data mining applications. In this paper, we propose a new method to measure the similarity between XML documents by considering their structures and contents. The similarity of document's structure is found by a simple string matching technique and that of document's contents is found by weights taking into account of the names and positions of elements. The overall algorithm runs in time that is linear in the combined size of the two documents involved in comparison evaluation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.8 no.3
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• pp.528-534
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• 2007

As XML is becoming a standard for representation and exchange of abundant information on the Web, solutions for a secure and selective dissemination of XML data, known as SDI, are strongly demanded. Such trends are more outstanding especially in distributed heterogeneous environment such as Peer-to-Peer. Although many approaches have been proposed to provide secure and efficient SDI mechanisms, almost previous approaches have focused only on filtering with user profile and they adopt center-oriented administration approaches. It is therefore difficult to adapt them directly to the distributed Peer-to-Peer environments characterized by dynamic participation. In this paper, we develop a novel dissemination method, which makesuse of authorization policy and secret sharing scheme. It provides more secure, scalable means for XML dissemination on Peer-to-Peer networks.

• Journal of Information Technology Applications and Management
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• v.10 no.1
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• pp.127-146
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• 2003

With the spread of Internet, e-business using Internet technology is being actively developed and operated. Currently, on behalf of the international e-business framework, International standard such as ebXML and Web Service is being advanced. We are able to publish and search business information through ebXML and Web Service and then actual trading between partners is accomplished. By the way, it is Registry that play an important part in e-business. Registry is an e-business infrastructure for enabling building, deploying, and the discovery of business Information. We can do e-business through Registries dynamically and share the resources. Representatives of Registry are ebXML and UDDI used as an international standard. We will meet with some problems when using Registries. ebXML Is focused on B2B collaborations and Web Service Is focused on application integrations. So we must use ebXML and Web Service characteristically, and sometimes use all at need. ebXML and Web Service contain business information by Registry specific way. So When using the services offered by ebXML and Web Service, we should access each Registry by using Registry specific tools. This thesis intended to integrate business information from ebXML Registry and UDDI Registry to accomplish e-business conveniently This thesis defined the common data model as well as integrated query language for integrated access to ebXML and Web Service along with design and implementation of the system.

• International Journal of Internet, Broadcasting and Communication
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• v.9 no.2
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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.

• Journal of the Korea Society of Computer and Information
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• v.6 no.1
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• pp.38-44
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• 2001

Nowadays, the study on XML as a standard method of exchange of information is active as Internet technology develops. This thesis designs and implements XML documents storage system using uniSQL/X in object-relational database. The system takes advantage of the merits of object-oriented databases, so that the structural information of XML documents can be effectively represented. The system uses split-storage method to allow frequent modifications of XML documents and suggests DTD-independent model so that it can store XML documents without DTD. And retrieval speed is improved by solving the issue of data duplication.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.787-789
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• 2002

인터넷상의 B2B(Business to Business)와 EDI(띠ectronic data Interchange)가 급속도로 발달 하면서XML이 메시지 교환 형식으로 활발하게 이용되고 있다. XML 문서는 논리적으로 통일하나 물리적으로는 여러 가지 표현이 존재만 수 있다는 특성을 가지고 있다. 이러한 점은 XML 디지털 서명과 같이 문서의 물리적 형태로써 유효성 여부를 판단하는 응용 등에서 치명적인 문제를 야기시킬 수 있다. 이와 같은 단점을 해결하기 위해 W3C에서는 상호 교환되는 XML 문서간의 논리적인 동일성을 물리적 수준에서 확인하기 위한 Canonical XML 알고리즘을 제안하여 사용하도록 권고하고 있다. 본 논문에서는 XML 디지털 서명 환경에서 Canonical XML 알고리즘을 수행하는 XML Canonicalizer를 설계하고 구현하였으며. 우리의 XML Canonicalizer는 XML 디지털 서명에서 뿐만 아니라 XML문서의 교환 시 물리적인 동일성이 요구되는 어떠한 응용에서도 사용 가능하다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10a
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• pp.25-27
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• 2001

웹 상의 데이터 표현 및 교환의 새로운 표준으로 인식되어 점차 그 교류의 앙이 중가하고 있는 XML 문서를 효과적으로 저장, 접근 및 검색하기 위한 기법에 대한 연구가 많았으나, 기존의 연구들은 데이터중심 문서의 특성이 두드러지는 XML 문서룬 대상으로 하는 것이 대두분이였다. 그러나 효과적인 XML 문서의 저장 및 검색을 위해서는 XML 문서의 실제 사용 목적이나 그 특성에 따라 XML 문서를 분류하여 각 특성에 맞는 저장, 접근 및 검색 기법을 개발하고 이를 통합한 XML 문서 저장 시스템의 개발이 요구된다. 따라서 본 논문에서는 통합 시스템 개발에서, 인간 이해 중심의 문서적 특성을 가지는 문서중심 문서를 위한 데이더 모델을 제안한다. 제안된 데이터 모델은 루트 노드가 존재하는 방향성과 순서가 있는 그래프 형태를 지원하며, XML 문서의 주요 구성 요소를 지원하는 여러 타입의 노드와 다양한 노드 사이의 관계를 표현하는 링크로 구성되어 XML 문서가 가지는 의미와 구조적 특징이 잗 표현되도록 하였다. 또한 모델링 후 손실되는 정보가 거의 없기 때문에, 다시 XML 문서로 변환하면 원래 XML 문서 그대로 복원되는 장점이 있어 문서중심 문서의 저장 및 검색을 위한 전용XML 저장 시스템에 적합한 데이터 모델이다.

• Proceedings of the Korea Database Society Conference
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• 2000.11a
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• pp.95-100
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• 2000

사실 표준 XQL(XML Query Language) 기반의 문서 질의를 이용하여 XML 문서에 대한 구조 검색과 내용 검색을 위한 문서검색 시스템을 구성하였다. 즉 XML 문서를 파징하여 내용 및 구조 정보를 트리구조로 구성하고, 표준 XQL을 이용하여 트리 구조 정보에 질의함으로서 구조 및 내용 검색을 하도록 구현하였다. 이를 이용한 응용분야로는 향후 방대한 크기의 XML문서 검색과 문서 관리, 전자 상거래 등 다양한 분야에 활용될 수 있는 요소기술로서 기대된다.