• Journal of the Korea Society of Computer and Information
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• v.10 no.3 s.35
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• pp.229-236
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• 2005

The Semantic Web enables machines to achieve an effective retrieval, integration, and reuse of web resources. The keyword search method currently used has a limit to accurate search results because of a simple string matching method in web environment. This paper proposes an Ontology-Based Information Retrieval which can solve the problems and retrieve better search results through semantic relations. In this system, we implemented the Cultural Assets Ontology based on OWL with RDQL and Jena API. we also suggest a method to handle properties stored in a database.

• Proceedings of the CALSEC Conference
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• 2003.09a
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• pp.33-38
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• 2003

협업적 제품 거래 환경에서는 제품의 전 수명주기에 걸쳐 기업들이 보유하고 있는 제품 지식을 공유, 교환함으로써 보다 적극적인 기업간 협업을 지원한다. 따라서 기업간 제품 지식을 어떻게 표현하고 공유할 것인가에 관한 문제와 다양한 정보 시스템으로부터 얻어질 수 있는 제품지식을 어떻게 통합하고, 확장할 것인가에 관한 문제가 매우 중요하다. 본 논문에서는 온톨로지 개념을 이용하여 제품 지식의 공유 및 통합 문제를 해결할 수 있는 온톨로지 모델을 제시하고 제품 설계 과정에 이를 적용함으로써 타당성을 검증하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.01a
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• pp.45-48
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• 2012

방대한 웹 페이지의 홍수 속에서, 의미상 서로 연관되었지만 산재되어 있는 정보들을 사용자에게 효과적으로 제공하기란 그리 쉽지 않다. 웹 페이지에서 질적으로 향상된 정보를 얻기 위해서는, 이질적이지만 서로 연관된 의미를 갖는 데이터들을 하나로 융합하는 방법이 필요하다. 본 논문에서는 이질적인 형태로 이루어진 다수의 웹 페이지들을 XML 기반의 메타데이터(metadata)로 융합하여 사용자에게 제공하는 방법을 제시한다. 본 논문에서 제안한 시스템에서 메타데이터는 온톨로지와 OWL을 이용하여 융합된다. 또한 제시한 방법을 검증하기 위해 지역정보 중 부동산을 사례를 들어 시스템을 구현한다. 구현된 시스템은 각기 다른 데이터를 가지고 있는 다수의 웹 페이지를 하나의 웹 페이지로 통합하는 과정을 거쳐 XML 문서 형태로 사용자에게 제공한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.1750-1752
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• 2010

본 논문에서 제안하는 초기 에이전트 기반 온톨로지 통합 프레임워크는 온톨로지 기반 응용에서의 온톨로지를 사용하는 에이전트를 위해 제안되었을 뿐만 아니라 온톨로지 통합 태스크와 관련되어 있다. 이 프레임워크에 의해, 에이전트의 행동이 상호작용 다이어그램으로 표현되어 진다. 이 프레임워크의 중요한 속성은 유연성과 확장성인데, 이것은 시스템에서 온톨로지 재사용을 허용함에 의해서 온톨로지 통합을 가능하게 한다.

• Journal of the Korean Society for information Management
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• v.24 no.1 s.63
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• pp.273-300
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• 2007

In this study it is intended to develop the ontology which can express the relation between objects with emphasis on the structural representation of semantics. Its interoperability with other kinds of previous ontology and metadata was also considered so that the developed ontology may be applicable to the real situation. The ABC Ontology can get extended into another field where the application of the concept of event is Possible, for ABC Ontology Provides the fundamental framework on the axis of event. In this study it is Music where ABC Ontology can be applied properly, which results in creating Music Ontology. Music Ontology Provides the infrastructure of knowledge for reasoning of Potential meaning as well as the simple semantic connection of terms. The extended model of ABC Ontology has been developed by applying Music Ontology, which is the domain ontology and conveys meaning, to ABC Ontology that represents the whole framework. The representation of conceptual relation in ABC Ontology turns into the association of the framework and meaning in the extended model of ABC Ontology, with reasoning rules which are typical in ontology Also, interoperability of the extended model of ABC Ontology is examined in consideration of co-operating with metadata different from those in it.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.779-780
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• 2007

• Journal of the Korea Institute of Information and Communication Engineering
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• v.5 no.1
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• pp.173-182
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• 2001

In this paper, we discuss how ontology Plays roles in building a distributed and heterogeneous knowledge-base system. First, we discuss relationship between ontology and agent in the Knowledgeable Community which is a framework of knowledge sharing and reuse based on a multi-agent architecture. Ontology is a minimum requirement for each agent to join the Knowledgeable Community. Second we explain mediation by ontology to show how ontology is used in the Knowledgeable Community. A special agent called mediation analyzes undirected messages and infer candidates of recipient agents by consulting ontology and relationship between ontology and agents. Third we model ontology as combination of aspects each of which can represent a way of conceptualization. Aspects are combined either as combination aspect which means integration of aspects or category aspect which means choice of aspects. Since ontology by aspect allows heterogeneous and multiple descriptions for phenomenon in the world, it is appropriate for heterogeneous knowledge-base systems. We also show translation of messages as a wave of interpreting multiple aspects. A translation agent can translate a message with some aspect to one with another aspect by analyzing dependency of aspects. Mediation and translation of messages are important to build agents easily and naturally because less knowledge on other agents is requested for each agent.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.9
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• pp.904-917
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• 2010

Much research on ontology has been done during the last decade in order to represent knowledge and connect data semantically in AI and Semantic Web areas. However, ontologies might be represented and defined in different ways depending on knowledge and intention of users. It causes heterogeneity problem that the same concept can be differently expressed. This paper introduces a XOB (XMDR-based Ontology Builder) system based on XMDR to resolve the problem. XOB creates ontologies by reusing classes and relations defined in XMDR. XOB therefore is able to either solve or minimize the heterogeneity problem among ontologies. This paper introduces the conceptual model and overall architecture of the proposed system XOB. This paper defines the process, algorithm, ontology generation rule that is required to create ontologies by using concepts registered in XMDR. Our proposal supports higher standardization than the previous approaches, and it provides many advantages such as consistent concept usage, easy semantic exchange, and so on. Therefore, XOB enables high-quality ontology creation and reduces cost for ontology integration and system development.

• International Journal of Contents
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• v.8 no.4
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• pp.21-29
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• 2012

It is not easy for users to effectively have information that is semantically related but scattered on the Web. To obtain qualitatively improved information in web pages, it is necessary to integrate information that is heterogeneous but semantically related. In this study, we propose a method that provides XML-based metadata to users through integration of multiple heterogeneous Web pages. The metadata generated from the proposed system is obtained by integrating different heterogeneous information into a single page, using entity identification based on ontology. A wheelchair information integration system for disabled people is implemented to verify the efficiency of the proposed method. The implemented system provides an integrated web page from multiple web pages as a type of XML document.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.324-325
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• 2016

The sensor network-based service collects data by using the sensor, the data is aware of the situation via the analysis, and the service provider provides a service suitable for the user via the context-awareness. However, this data is generated, it is difficult to match the metadata and standard units. The data integration is required to use the data generated by the different specifications of the sensor efficiently. Accordingly, in this paper we propose a method using an ontology as a method to integrate the data generated by the existing sensors and the new sensor. The ontology is mapping to the standard item and sensors, also include a type and structural difference. The mapping is comprised of two:data mapping, and metadata mapping. There are standard items that are created in this way, type of data exchange between services. This can solve the heterogeneous problem generated by sensors.