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Research on Constructing Ontology for the Semantic Web

Research on Constructing Ontology for the Semantic Web
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Author(s): Song Jun-feng (The National University of Defense Technology, China), Zhang Wei-Ming (The National University of Defense Technology, China), Tang Da-quan (The National University of Defense Technology, China) and Tang Jiu-yang (The National University of Defense Technology, China)
Copyright: 2006
Pages: 5
Source title: Emerging Trends and Challenges in Information Technology Management
Source Editor(s): Mehdi Khosrow-Pour, D.B.A. (Information Resources Management Association, USA)
DOI: 10.4018/978-1-59904-019-6.ch014
ISBN13: 9781616921286
EISBN13: 9781466665361

Abstract

The Web consists of numerous pages encoded in HTML; its contents are readable and understandable for human, but not understandable for machine. So it’s hard for machine to process the web contents meaningfully. But the web is enormous and still growing continuously, which makes it urgent for the web contents to be machine understandable so that the web contents can be processed automatically and meaningfully by machine. To solve these problems, Tim Berners-Lee put forward the Semantic Web [1][2], which is an extension of the current web. The Semantic Web is not just a platform for presenting information, but it can be understood and used to reason by machine. To make the web contents understandable to machine and suitable for inference, we need to establish ontology and use terms defined in ontology as metadata to annotate the web contents. Compared with the presentation markups used on the web nowadays, these markups are semantic markups. [1] In this paper, we distinguish the definitions of ontology and domain ontology. Based on definitions in [3,4,5,6], the definitions of domain, domain conceptualization, domain ontology and ontology are given as follows. Definition1. Domain is a section of the world about which we wish to express some knowledge; domain conceptualization is to abstract a set of terms and a set of knowledge from the domain in terms of the tasks to be solved and the ontological commitment of ontology language used; domain ontology is {the set of domain terms, the set of domain knowledge}, it’s explicit specification of domain conceptualization, usually, we use ontology language to write down this specification; ontology is explicit specification of conceptualization about the world, there is only one ontology about the world, no application needs to use the whole ontology. The relation between ontology and domain ontology is defined as follows: Definition2. Suppose the world W can be divided into n domains, then ontology of W can be obtained by integrating domain ontologies of these n domains. In practical application, domain ontology or the integration of several domain ontologies is needed. In this paper, we concentrate on domain ontology representation, reasoning and integration for the Semantic Web, the organization of this paper is shown as follows. Organization of This Paper In section 2 we introduce ontology languages for the Semantic Web and choose OWL Lite and SWRL, which are suitable trade-offs between expressivity of knowledge and complexity of reasoning problems, as standard ontology languages on the Semantic Web. In section 3 we propose DORRSW approach (domain ontology representation and reasoning for the Semantic Web). In section 4, we propose MDOISW approach (multiple domain ontologies integration for the Semantic Web). In section 5, DORRSW approach and MDOISW approach are used to solve example problems to illustrate the procedures of these two approaches. In section 6 the related works are introduced. Section 7 gives the conclusion.

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