• 한국공간정보시스템학회:학술대회논문집
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• 1998.07a
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• pp.181-195
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• 1998

지리 정보 시스템(GIS)은 그 특성상 대용량의 GIS 데이타를 사용하며, 다양한 운영체제와 하드웨어 상에서 구현된다. 이렇게 상이한 운영체제와 하드웨어상의 공간데이타들은 일반적으로 서로 다른 GIS 데이타 포맷을 갖고 있기 때문에 효율적인 자료 교환이 불가능하다면 데이타 공유가 매우 어려울 뿐만 아니라 공통 데이터의 중복 보관 및 관리로 인해 막대한 경제적 손실을 가져온다. 이와 같은 문제점을 해결하기 위해 국외에서는 이미 GIS 데이타 교환을 위한 방안으로 공통 교환 표준 포맷 작업이 10여년 전부터 진행되어왔으며, 국내의 경우도 국가 차원에서 지리 정보시스템의 국가 표준을 설정하고, 기본 공간 데이타베이스를 구축하고 있다. 그리하여, 국가 기본 포맷과 공통 데이타 교환 포맷의 표준으로 SDTS(Spatial Data Transfer Standard)를 채택하였다. 본 논문에서는 범용의 SDTS 변환 시스템의 구현에 필요한 공간 데이타 분석, 논리적 설계, 물리적 설계 등의 전반적인 SDTS 변환과정, 테스트 검증 사항, 그리고 반드시 지켜야 할 규칙들을 제시한다. 마지막으로, 실제 공간 데이타인 GOTHIC과 SDTS 간의 변환 시스템의 설계와 구현에 대해서 언급한다.

• Journal of Korea Spatial Information System Society
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• v.2 no.2 s.4
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• pp.99-115
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• 2000

A geographic information system (GIS) generally has a great deal of geographic data and has a singular storage structure individually. It is very hard to exchange geographic data between geographic information systems which store their geographic data with incompatible formats. Moreover, since it needs large amount of storage space to store geographic data and expensive cost to input them. In this paper, we designed and implemented a SDTS (Spatial Data Transfer Standard) Data Conversion System for Gothic which is an existing geographic information system. In order to convert geographic data without loss of information, we first carefully define a mapping between SDTS data and Gothic data. Especially, since SDTS data are in the format of ISO8211, the FIPS123 library is used to access them. Because the internal data format of Gothic is not open to the public, we also use the Gothic library to access Gothic data. The SDTS data conversion system developed in this paper uses an intermediate file to convert geographic data efficiently. In addition, we use UIL (User Interface Language) to implement a graphic user interface (GUI) of our system.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1992.04b
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• pp.486-495
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• 1992

본 EDI변환처리시스템은 EDI문서 표준을 데이타베이스화해서 EDI문서 표준의 변경시 관리를 용이하게 한다. EDI표준데이타베이스를 table-driven방식으로 참조해서 표준 서식의 생성과 입력, 변환처리를 하도록 설계함으로써 시스템 구성을 간결하게 했으며, EDI표준변경에 따른 영향을 최소화시켰다. 또한 입력, 송수신된 EDI문서를 효율적으로 관리하는 데이타베이스를 구축했다. 본 시스템은 공중전화망을 통하여 변환 처리된 데이타를 전송하는 기능을 제공하고 호스트 컴퓨터에 대한 Front-End형 및 마이크로 컴퓨터의 Stand-Alone형으로 활용할 수 있다.

• Journal of the Korea Society of Computer and Information
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• v.8 no.4
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• pp.41-46
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• 2003

Recently, as the growth of the application of geographical information in various application fields, a geographic information system(GIS) has been building for using them efficiently. GIS has been managing them in use data format individually. To service geographical information based distribution efficiently, there must be a Data Conversion System that can deal with converting of GIS geographical information with incompatible formats. Therefore, in this paper, we design and implement a Spatial Data Translation System with international standard to convert geographic data efficiently.

• Journal of KIISE:Databases
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• v.31 no.3
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• pp.232-242
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• 2004

Metadata is a general notion of data about data to improve data sharing and exchanging by definitely describing meaning and representation of data. However, metadata has been created in various ways and It caused another kind of heterogeneity problem named metadata heterogeneity problem. Recently, the research on metadata gateway approach that allows metadata heterogeneity is being more actively progressed. However, the existing commercialized systems that have been implemented with the metadata gateway approach are dependent on a metadata schema. In this paper, we propose a message conversion system which separates the mapping information from the mapping rules between heterogeneous metadata schemas. The proposed system dynamically manages standardized data elements by applying ISO/IEC l1179. Therefore, the proposed system provides the set of standard data elements to create consistently metadata of new databases and provides a fundamental resolution to the metadata heterogeneity problem.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1994.10a
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• pp.731-736
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• 1994

STEP(Standard for the Exchange of Product Data)은 제품데이타의 표현 및 교환에 관한 국제표준으로서, 특정 시스템에 관계없이 제품생산에 관계된 정보를 표현할 수 있는 중립표준을 제공하는데 그 목적이 있다. STEP은 화일교환을 위한 중립표준을 제공할 뿐만 아니라 , 제품데이타베이스를 수현하는 기반을 제공한다. 따라서, 향후 STEP은 좁은 의미 로서는 시스템간의 데이타 교환의 표준으로,넓은 의미로서는 컴퓨터통합 생사시스템(CIMS) 의 구현시 정보모델의 근간으로 사용될 것으로 예상된다. 본 연구에서는 STEP을 이용하여 CAD의 형상정보와 특징형상정보를 변환하는 변환기를 개발하였다. 변환기의 개발은 크게 3단계로 나뉘어 지는데, 1) STEP에서 제정한 데이타 정의어인 EXPRESS를 이용하여 각 CAD 시스템에서 사용하는 포멧을 따라 형상정보및 특징형상정보의 스키마를 모델링하는 단계 2) 실제데이터를 이용하여 모델링된 스키마에 맴핑(mapping0하는 단계, 3) 피니컬 화일로 변환하는 단계를 거치게 된다. 이글에서는 STEP을 이용한 특징형상정보의 호환을 위한 변환기의 구조를 제안하고, EXPRESS를 이용한 스키마 모델링 및 특징형상 정보의 변환사례를 소개한다.

• Journal of KIISE:Databases
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• v.31 no.4
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• pp.432-443
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• 2004

As the XML data has been widely used in the Internet, it is necessary to store and retrieve the XML data by using DBMSs. However, relational DBMSs suffer from the model difference between graph structure of the XML data and table forms in relational databases. We propose an ORDBMS-based DTD-dependent XML data management system Xing. Xing stores XML data in a DTD-dependent form in an object database. Since the object database schema has a graph structure and supports multi-valued attributes, mapping from an XML data model and queries into an object data model and OQLs is a simple problem. For rapid storing of large quantities of the XML data, we use SAX parser with customized Xing-tree which requires a small memory space compared with the DOM-tree. Xing also returns the query result in an XML document form. We have implemented the Xing system on top of UniSQL object-relational DBMS for the validity checking and performance comparison. For XML genome data from GenBank, and experimental evaluation shows that Xing can provide significant performance improvement (maximum 10 times) compared with the relational approach.

• Journal of Korean Society for Geospatial Information Science
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• v.4 no.2 s.8
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• pp.109-121
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• 1996

It is very difficult to exchange geographical data among geographical information systems which store their spatial data with independent storage structures. Since, moreover, large amount of storage space is necessary to store spatial data and ex pen sive cost is required to input them, waste will grow as they are stored redundantly. Therefore, it is essential to share them with other geographical information systems by exchanging spatial data among them. In order to exchange spatial data efficiently, there exist several international standards for data exchange format. In this paper, we design and implement a data conversion system that converts geographical data between SDTS (Spatial Data Transfer Standard) which is adopted as the national standard for common data exchange format and Informap which is the existing mapping system. We first analyze the storage structures of SDTS and Informap, respectively and develop gateway functions according to these analyses for efficient conversion. Finally, we design and implement the overall data conversion system between SDTS and Informap using the gateway functions.

• Journal of Korean Society for Geospatial Information Science
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• v.4 no.1 s.6
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• pp.57-66
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• 1996

For the effective use of spatial data, it is necessary to translate the diverse digital map data (here, digital map for car navigation system) into common GIS data structure(here, ARC/INFO). For this purpose, analysis on the structure of the established digital map was fulfilled, the data model for effective translation tool was designed. As a result, the possibility to translate diverse digital map structures (database) into GIS tools and to share them, with the users' point of view, was successfully verified.

• Journal of KIISE:Computing Practices and Letters
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• v.10 no.5
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• pp.406-418
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• 2004

Last days, various kinds of applications and system were individually introduced into specific groups or enterprises by different objective without considering interoperability among those. However, the environment for data processing is changing rapidly in these days. And now the necessity is growing to integrate and couple applications and system in the process dimension for more flexible and quicker data processing on these application programs and system. When integrating these application programs or system, an integration based on XML is recommended as it is one of good methods which will the additional cost and satisfy the requirements of the integration. This is because the XML is not only device-independent data type which can be used any platform, but also it uses XSLT, the document conversion standard established by W3C, which allows easy data conversion from one to another type on occasion of demands. This paper studies a design and implementation of system to convert XML structure. This system shows the structure of source- side providing data and destination-side processing data with using XML schema that defines structural information of a XML document. And this system defines the structure relationship of desired form as mapping structural information and data. This system creates the XSLT document that defines conversion rule between two structures based information which is defined. The XSLT document which is created as described above will convert data to be appropriate to the structure of the destination- side. By implementing this system, it is able to apply a document into various kinds of structure without considering specific system or platform and it is able to construct XSLT document to which meaning of desired form can be given. This paper aims to offer a process conversion between documents and to improve interoperability and scalability, so that we can contribute to build XML document processing environment