• The KIPS Transactions:PartD
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• v.15D no.4
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• pp.557-568
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• 2008

An ontology as the core element of Semantic Web is a formal specification of a conceptualization of shared domain knowledge. The use of well-defined ontologies can increase the quality of interoperable information systems in the area of Semantic Web. However, in practice, it is not easy to develop high-quality ontologies which have no errors. Therefore, with methodologies for ontology design, various methods or tools for ontology analysis supporting for error-detection might be very helpful for ontology developers. In this paper, we propose a novel approach for analyzing the core constructs of ontology based on the Formal Concept Analysis and develop a tool that supports error-checking ontologies. Our approach can serve not only as a guidance to modify the existing ontologies, but also as a valuable tool in developing high-quality ontologies.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.47-50
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• 2006

최근 시맨틱웹의 중요성이 두드러지면서 다양한 분야에서 연구가 활발하게 진행되고 있다. 이렇듯 중요하게 두드러지고 있는 시맨틱웹의 연구가 진행되기 위해선 다양한 분야의 온톨로지가 필요하다. 현재 많은 온톨로지 구축 관련 도구들이 있어 온톨로지 구축에 편리함을 제공하고 있지만, 여전히 온톨로지의 구축은 많은 노력과 시간이 필요하다. 특히, 대용량의 온톨로지 구축은 더 많은 노력과 시간이 필요하다. 따라서 본 논문은 기본적으로 제시된 온톨로지 구축방법 모델들의 비교 분석을 통해 대용량 온톨로지 구축에 협력적 개발 과정을 제시하고자 한다.

• Korean Journal of Oriental Medicine
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• v.12 no.1
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• pp.1-12
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• 2006

Recently according to the WIPO's policy of preserving traditional knowledge, constructing the database of traditional knowledge is in progress. To maximize the retrieving power of the knowledge resource systems which will be developed later, it is necessary to construct the ontology for the concepts used by traditional knowledge. In order to construct the ontology systematically, a standardized ontology representation method is needed, and OWL(Web Ontology Language) is the recommendation of W3C(World Wide Web Consortium) and is widely used. Ontology tools can be used to ease the construction of OWL ontology, but no research about the comparison of OWL ontology tools exists. This paper compares the tools of OWL by an objective point of view and with that one can make a decision of using the appropriate tool for constructing OWL ontologies.

• The Journal of Society for e-Business Studies
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• v.13 no.3
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• pp.85-101
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• 2008

The semantic web is taken as next generation standards of information exchange on the internet to overcome the limitations of the current web. To utilize the information on the semantic web, tools are required the functionality of query search and reasoning for the ontology. However, most of semantic web management tools cannot efficiently support the search for the complex query because they apply Triple-based storage structure about RDF metadata. We design the storage structure of the ontology in corresponding with the structure of ontology data and develop the search system(SMART-DLTriple) to support complex query search efficiently in this research. The performance of the system using new storage structure is evaluated to compare with the popular semantic web management systems. The proposed method and system make a contribution to enhancement of a practical ontology reasoning systems due to improved performance of the ontology search.

• The Journal of Korean Association of Computer Education
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• v.14 no.1
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• pp.159-168
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• 2011

This study analyzed whether the ontology-based information-searching model affected the ability of students to effectively search for meaningful information to carry out their projects. The experiment results illustrated that the amount of relevant information sought by the ontology-based information retrieval (OIR) method was significantly greater than that of the existing information retrieval (EIR) method. In addition, the relevance rate of the bookmarked documents sought by the OIR method was significantly greater than that of the EIR method. Interviews showed that the OIR model was helpful for students to effectively find information and thus, it helped them to complete the project more easily. Furthermore, the OIR model was beneficial for them to understand the subordinate concepts and their relationships for an important learning concept. The results of this study indicate that the OIR model could be used as a supplementary learning tool for project-based learning.

• The Journal of Society for e-Business Studies
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• v.13 no.1
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• pp.1-20
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• 2008

Ontologies are expected in various areas as promising tools to improve communication among people and to achieve interoperability among systems. For communications between different business domains, building an ontology through integrating existing ontologies is more efficient way than building the ontology without them. However, integration of ontologies is very struggling work since languages, domains, and structures of ontologies are different from each other. In this paper, we suggest an Ontology Architecture which solves this problem by providing a systematic framework to classify ontologies from three kinds of viewpoints : language, domain range, constructs. The Ontology Architecture consists of 3 axes according to the 3 viewpoints : Ontology Meta Layer axis, Semantic Domain Layer axis, and Ontology Constructs Layer axis. Because 3 axes in Ontology Architecture are designed to improve the syntactic and semantic interoperability among ontologies, the integration of ontologies can be readily achieved.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.183-186
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• 2006

독립적으로 구축되고 운영되어온 정보 자원의 공유와 통합된 서비스를 위해서 공통 온톨로지를 구축하고 활용하는 방법에 대한 연구가 활발히 진행되고 있지만, 온톨로지의 구축에 소요되는 많은 시간과 높은 비용은 온톨로지를 이용한 정보 통합의 있어 큰 장애가 된다. 본 논문에서는 UML 로 작성된 시스템 모델로부터 온톨로지 구축에 필요한 지식을 유도하여 초기 단계 도메인 온톨로지를 구축하는 방법을 제시하였다. 특히, UML 모델을 온톨로지 언어인 OWL로 변환할 수 있는 구체적인 방향을 제시함으로써, 향후 자동화된 도구 개발의 이론적 기반을 될 것으로 기대한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.353-356
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• 2005

온톨로지는 에이전트가 지식 레벨 메시지 교환을 위해 사용하는 용어를 정의하는데 중요한 역할을 수행한다. 객체지향 모델링 중 특히 UML은 소프트웨어 공학 분야에서 많은 발전이 이루어져 왔으며, 대부분의 상업용 도구들에 의해 지원될 수 있다. 따라서, 에이전트 시스템에서 온톨로지 표현을 위해 UML을 사용한다면 에이전트 기반 시스템 개념의 이해를 돕는데 매우 효과적일 것이다. 본 연구는 온톨로지 모델링을 위해 UML 사용의 가능성을 제시하고자 한다.

• The Journal of Society for e-Business Studies
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• v.10 no.3
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• pp.21-36
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• 2005

Current web search includes a lot of different results with information that user does not want, because it searches information using keyword mapping. Ontology can describe the correct meaning of web resource and relationships between web resources. And we can extract suitable information that user wants using Ontology Accordingly, we need the ontology to represent knowledge. W3C announced OWL(Web Ontology Language), meaning description technology for such web resource. However, the development of a special tool that can effectively compose and edit OWL is inactive. In this paper, we designed and developed an OWL authoring system that can effectively provide the generation and edit about OWL.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.419-422
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• 2007

본 논문은 개인이 소장하고 있는 문서, 이미지, 오디오, 동영상 등의 미디어를 통합 관리하는데 사용할 수 있는 개인용 미디어 온톨로지에 대해서 기술한다. 본 논문에서 기술하는 개인용 미디어 온톨로지는 미디어 정보 기술을 위한 부분과 미디어를 소장하고 있는 개인 정보 기술을 위한 부분, 그리고 온톨로지 기반 추론을 위한 추론 규칙으로 구성된다. 온톨로지는 W3C에서 표준으로 정의한 온톨로지 표현 표준 언어인 OWL (Web Ontology Language)로 기술되어 있어서, OWL을 지원하는 다양한 도구들을 이용할 수 있다. 뿐만 아니라, 온톨로지 추론 규칙을 함께 기술하고 있어서 온톨로지 기반 추론을 통해서 온톨로지에 명시적으로 기술되지 않은 정보들을 획득하는 것이 가능하도록 한다.