• The KIPS Transactions:PartD
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• v.11D no.5
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• pp.1021-1030
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• 2004

When any data-centric XML documents are stored and managed in RDBMS, schema extracting from XML Schema is an imminent problem. Furthermore, when they are stored in partitioned way on created table, lots of null values will be produced and/or be increased cost for join, so we need a solution to solve these problems. This paper proposes a Schema Hybrid Inlining technique to generate relational schema of XML documents. The suggested technique creates a relational schema based on the XML Schema graph. Also, the technique expands the legacy Inlining method by manual and heuristic processing table generation method of cardinality and in-degree. Then, an ancestor node, terminal node, and creating a new table on the derived relation in this technique. DTD-dependent storage method uses partitioned storing and relation path element information reformed structured-searching method to reduce joining operation cost that is a weak point of it.

• Journal of KIISE:Software and Applications
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• v.30 no.1_2
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• pp.164-172
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• 2003

Web service implementations are now rapidly growing. Web services are easily achieved by XML messaging for most programming languages. Applications usually utilize web services through APIs tied to a specific implementation of SOAP. nML is a dialect of SML and OCaml made in ROPAS. The soaptype type in nML is defined for the value of SOAP encoding. SOAP encoding specification defines rules for serialization of a graph of typed objects using XML Schema. XML Schema validates XML SOAP value. The soaptype type is encoded to XML and decoded from XML. It is necessary to guarantee safe encoding and decoding. So, the definitions for element and type definition in XML Schema are specified by element type and typeinfo type, which include the part of the definitions of XML Schema specification.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.23-26
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• 2005

XML 문서의 구조를 정의하는 XML Schema 는 문법이 복잡하며 설계자에 따라 표현방법이 달라질 수 있고 잘못된 설계는 시스템의 자원을 낭비할 수 있다. 특히 한정된 시간과 비용으로 진행되는 프로젝트에서 잘못된 XML Schema 설계는 프로젝트의 지연 및 비용 초과의 주된 원인이 된다. 따라서 본 논문에서는 XML 로 작성된 데이터 중심의 전자문서 전송 시 필요한 XML Schema 를 표준화된 방식으로 생성하는 변환정보파일 모델을 설계하였다. 그리고 설계된 변환정보파일모델에 정의된 메타 데이터를 이용하여 객체지향 개념을 도입한 XML Schema 를 자동 생성하는 시스템을 설계, 구현하여 표준화된 XML Schema 를 생성하였다.

• The KIPS Transactions:PartD
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• v.9D no.3
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• pp.381-388
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• 2002

XML documents, which are becoming new standard for expressing and exchanging data in the Internet, don't have defined schema. It is not adequate to directly apply XML documents to the existing SQL or OQL. Research on how to extract Schema for XML documents and query language is going on actively. For users' query, the results could be too tony or too less. It Is important to give the users adequate results. This paper suggests the way to extract many levelized schema according to the frequency of element occurrence in XML documents. The Schema can be reduced or extended to correspond to the users' query more flexibly.

• Journal of KIISE:Computing Practices and Letters
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• v.7 no.6
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• pp.569-581
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• 2001

XML Schema which enables the second revolution of Internet with XML rapidly emerging as a standard for XML document structure modeling. XML Schema modeling has more complex structures and information than DTD modeling. In this reason, XML Schema modeling tool which has some more specialized functionalities others is needed. In this paper, we have developed the XML application development method called \"Design and develop\" and implemented the prototype system named XSD4j which supports UML based XML Schema modeling and provides a XML application development platform. Using XSD4j, developers can get an easy and conceptual schema modeling method, XML storage schema for XML document, and persistent DOM API which is a standard interface between document and application program.n program.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.6
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• pp.1087-1094
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• 2008

Recently, XML has been widely used as a standard for a data exchange, and there has emerged the tendency that the size of XML document becomes larger. The data transfer can cause problems due to the increase in traffic, especially when a massive data such as Data Warehouse is being collected and analyzed. Therefore, an XMDR wrapper can solve this problem since it analyzes the tree structures of XML Schema, regenerates XML Schema using the analyzed tree structures, and sends it to each station with an XMDR Query. XML documents which are returned as an outcome encode XML tags according to XML Schema, and send standardized messages. As the formalized XML documents decrease network traffic and comprise XML class information, they are efficient for extraction, conversion, and alignment of data. In addition, they are efficient for the conversion process through XSLT, too, as they have standardized forms. In this paper we profuse a method in which XML Schema and XMDR_Query sent to each station are generated through XMDR(extended Meta-Data Registry) and the generation of products and XML conversion occur in each station wrapper.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.7-10
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• 2005

본 논문에서는 관계형 데이터베이스를 이용하여 XML Schema 문서를 저장 및 갱신 시 유효성이 유지되는 저장 모델을 설계하였다. 기존의 XML Schema 저장 모델은 갱신 시 유효성 검증을 위해 XML Schema 를 파일로 추출하여 변경한 후 XML Parser 를 이용하는 복잡한 과정을 필요로 한다. 이 논문에서 설계한 모델은 슈퍼타입 서브타입을 이용한 모델링과 관계형 데이터베이스에서 제공 하는 참조 키, NOT NULL, Default, Check(Rule), Trigger 등의 제약 조건을 사용하므로 다른 응용 프로그램의 의존 없이 저장 및 갱신 데이터의 유효성을 간단하게 검증할 수 있다. 그러므로 이 저장 모델을 이용하면 XML Schema 문서가 데이터베이스에 저장이 되어 있는 그 자체로 유효한 스키 마임을 보장할 수 있어 저장 및 갱신의 효율을 높일 수 있는 장점이 있다. 본 논문에서 설계한 저장 모델은 상용 관계데이터베이스인 SQL 서버 2000 에 적용하여 테이블과 제약조건을 설정한 후 데이터 갱신과정을 실험하였으며, 실험결과 XML Schema의 작성규칙에 위배되는 변경 시도는 설정한 제약조건에 의해 사전 방지되어 데이터의 유효성이 유지됨을 확인하였다.

• Journal of Korea Society of Industrial Information Systems
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• v.10 no.3
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• pp.7-14
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• 2005

There are lots of XML security researches as growing importance of XML. Apvrille and Girier proposed a XML signature schema with a time stamping protocol(TSP) to support timeliness. However, the security of the timeliness in their schema depends on only a trusted security authority(TSA). To solve this problem, they suggested a solution by the distributed and linked model, but their solution has a big overhead. This paper proposes a new XML signature schema to solve the overhead problem. The proposed signature schema can offer the timeliness by the XML signature schema with user's timestmap and it solve the TSA's security problem.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.5
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• pp.972-977
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• 2003

XML has weakness problems on document modulation and elimination of data Because of the XML gives priority to present data format, XML signature, XML encryption, or XML access control is provided to overcome those weakness problems. However, structured XML efficiency contravention problem occurred from XML encryption and absence of protection from DID attack are still remains unsolved. In this paper, we suggests the XML schema that satisfies both validity and encryption. The DTD is unnecessary because XML schema supports Well-Formed XML documents and include meta information. Also XML schema has possibility to generate each XML document dynamically and because of self efficiency investigator rule, it has an advantage on extendability of DID based encryption of XML documents.

• Journal of the Korea Society of Computer and Information
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• v.9 no.4 s.32
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• pp.19-26
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• 2004

XML DTD is defining expression of simple form for XML document, there is much difficulties to define structure of XML document. Solving XML DTD's problem, W3C was select XML schema by standard in 2001. This paper proposes a design to XML DBMS using Relational Database based on XML schema to be selected by standard from W3C to overcome XML DBMS's shortcoming using XML DTD.