• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.93-96
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• 2006

본 논문에서는 OGC 의 공간 정보 인코딩 표준 명세인 GML 을 기반으로 공간 데이터 웨어하우스를 구축하는 스키마를 제안한다. GML 기반의 스키마는 비공간 정보뿐만 아니라 공간 정보에 대한 정의가 가능하다. 그리고 XML 스키마를 이용하여 전체 큐브 스키마, 차원 스키마 및 사실테이블에 대한 스키마 정의의 예를 보인다. 따라서 제안 기법은 GML 을 이용하여 이질적인 시스템간의 데이터 통합이 용이하고, 비공간 정보뿐만 아니라 공간 정보의 활용이 가능하다. 그리고 공간 데이터 웨어하우스의 개념계층 관계에 대한 표현이 용이하고 구조에 대한 이해가 쉽다.

• Journal of the Korea Society of Computer and Information
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• v.13 no.6
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• pp.77-86
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• 2008

The Web information sources can be regarded as the largest distributed database to the users. By virtually integrating the distributed information sources and regarding them as a single huge database, we can query the database to extract information. This capability is important to develop Web application programs. We have to infer a database schema from browsing-oriented Web documents in order to integrate databases. This paper presents a heuristic algorithm to infer the XML Schema fully automatically from semi-structured Web documents. The algorithm first extracts candidate pattern regions based on predefined structure-making tags, and determines a target pattern region using a few heuristic factors, and then derives XML Schema extraction rules from the target pattern region. The schema extraction rule is represented in XQuery, which makes development of various application systems possible using open standard XML tools. We also present the experimental results for several public web sources to show the effectiveness of the algorithm.

• Journal of the Korean School Mathematics Society
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• v.16 no.1
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• pp.219-240
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• 2013

It is the aim of this paper to suggest the method constructing abstract schema in similar mathematical problem solving processes. We analyzed closely the existing studies about the similar problem solving. We suggested the process designing a method for helping students construct an abstract schema. We designed the teaching method constructing abstract schema by appling this process to a group of similar problems chosen by researchers. We applied the designed method to a student. And we could check the possibility and practice of designed teaching method by observing the student's reaction closely.

• Journal of the Korean Society for Library and Information Science
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• v.36 no.3
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• pp.155-179
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• 2002

The purpose of this study is to extract metadata based on Dublin Core from national construction information DBs, to design XML schema from the extracted metadata and to apply the previous works to integrated information retrieval system. To extract metadata, co-work was performed with librarians in the field of construction information, and. as a result, twelve metadata elements from Dublin Core and one administrative metadata could be extracted. Based on the investigation and analysis of those thirteen metadata elements, XML schema design process was described in detail. finally, the service environments of integrated information retrieval system to which XML schema was applied was introduced. Further study was also provided.

• The KIPS Transactions:PartD
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• v.11D no.3
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• pp.519-532
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• 2004

With the explosion of bioinformatics data such proteins and genes, biologists need a integrated system to analyze and organize large datasets that interact with heterogeneous types of biological data. In this paper, we propose a integration system based on a mediated data warehouse architecture using a XML model in order to combine protein related data at biology laboratories. A fact constellation model in this system is used at a common model for integration and an integrated schema it translated to a XML schema. In addition, to track source changes and provenance of data in an integrated database employ incremental update and management of sequence version. This paper shows modeling of integration for protein structures, sequences and classification of structures using the proposed system.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11c
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• pp.1417-1420
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• 2003

도서관 통합 검색 시스템은 기존의 단일 사이트 도서관 검색 시스템과는 달리 한번의 질의로서 여러 사이트를 통합하여 검색할 수 있는 시스템이다. 본 논문에서는 XML 기반 DB 통합 검색 시스템인 DataBlender 를 이용하여 세 개의 도서관 사이트를 연동 및 통합하여 검색할 수 있는 시스템을 제안한다. 본 논문에서는 DataBlender 를 소개하고 각 도서관 사이트의 스키마 설계, 통합 스키마, 검색 질의 화면 설계 및 검색 시스템 구현에 관한 내용을 기술한다.

• Journal of Korea Society of Industrial Information Systems
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• v.6 no.3
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• pp.51-64
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• 2001

Schema integration is one of the most difficult issues in the heterogeneous and distributed geographic database systems (GDSs). As the use of spatial information in various application areas becomes increasingly popular, the integration of geographic information has become a crucial task for decision makers. Most existing schema integration techniques described in the database literature, however, do not address the problems of managing heterogeneities among complex objects that contain visual data and/or spatial and temporal information. The difficulties arise not only from the semantic conflicts, but also from the different representations of spatial models. Consequently, it is much more complex to achieve interoperability in the area of geographic databases. This research attempts to provide a solution to such problems. The research reported in this paper describes a schema integration methodology and a prototype toolkit developed to assist in schema integration activities for GDSs.

• Journal of Korean Society of Archives and Records Management
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• v.16 no.3
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• pp.99-129
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• 2016

Records and archives on military sexual slavery should be managed systematically due to its historical and educational values. Currently, the National Records Designation related to the military sexual slavery by Japan are managed in various related organizations including the National Archives of Korea. Some private institutions have diverse collections on the military sexual slavery by Japan. They have a collection of various types of records and archives. This study aims to build an integrated metadata schema for managing the records and archives on the military sexual slavery by Japan. To achieve this goal, this study examined the institutions and organizations related to the military sexual slavery by Japan, and analyzed the types and characteristics of their records and archives. Based on the results, a metadata schema was proposed for the records and archives of the "Military Sexual Slavery by Japan."

• Journal of Educational Research in Mathematics
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• v.18 no.1
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• pp.123-135
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• 2008

This study analysed the schemata which are requisite to understand and prove examples of mathematical induction, and examined students' construction of the schemata. We verified that the construction of implication-valued function schema and modus ponens schema needs function schema and proposition-valued function schema, and needs synthetic coordination for successive mathematical induction schema. Given this background, we establish $1{\sim}4$ levels for students' understanding of the mathematical induction. Further, we analysed cognitive difficulties of students who studying mathematical induction in connection with these understanding levels.

• The KIPS Transactions:PartD
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• v.10D no.2
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• pp.233-246
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• 2003

The mediator-based system integrates heterogeneous information systems with the flexible manner. But it does not give much attention on the query optimization issues, especially for the query reusing. The other thing is that it does not use standardized metadata for schema matching. To improve this two issues, we propose mediator-based Distributed Information Integration System (DIIS) which uses query caching regarding performance and uses ISO/IEC 11179 metadata registry in terms of standardization. The DIIS is designed to provide decision-making support, which logically integrates the distributed heterogeneous business information systems based on the Web environment. We designed the system in the aspect of three-layer expression formula architecture using the layered pattern to improve the system reusability and to facilitate the system maintenance. The functionality and flow of core components of three-layer architecture are expressed in terms of process line diagrams and assembly line diagrams of Eriksson Penker Extension Model (EPEM), a methodology of an extension of UML. For the implementation, Supply Chain Management (SCM) domain is used. And we used the Web-based environment for user interface. The DIIS supports functions of query caching and query reusability through Query Function Manager (QFM) and Query Function Repository (QFR) such that it enhances the query processing speed and query reusability by caching the frequently used queries and optimizing the query cost. The DIIS solves the diverse heterogeneity problems by mapping MetaData Registry (MDR) based on ISO/IEC 11179 and Schema Repository (SCR).