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Semi-Automatic Ontology Extension Using Spreading Activation

Liu, Wei and Weichselbraun, Albert and Scharl, Arno and Chang, Elizabeth (2005) Semi-Automatic Ontology Extension Using Spreading Activation. Journal of Universal Knowledge Management (1). pp. 50-58. ISSN 0948-69x

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Official URL: http://www.jukm.org/jukm_0_1/semi_automatic_ontolo...

Abstract

This paper describes a system to semi-automatically extend and refine ontologies by mining textual data from the Web sites of international online media. Expanding a seed ontology creates a semantic network through co-occurrence analysis, trigger phrase analysis, and disambiguation based on the WordNet lexical dictionary. Spreading activation then processes this semantic network to find the most probable candidates for inclusion in an extended ontology. Approaches to identifying hierarchical relationships such as subsumption, head noun analysis and WordNet consultation are used to confirm and classify the found relationships. Using a seed ontology on "climate change" as an example, this paper demonstrates how spreading activation improves the result by naturally integrating the mentioned methods.

Item Type:Article
Uncontrolled Keywords:co-occurrence analysis, disambiguation, ontology extension, semantic network, spreading activation
Subjects:Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions:Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
Faculty of Law, Arts and Social Sciences > School of Management
ID Code:4
Deposited By: Dr Albert Weichselbraun
Deposited On:20 Jun 2009 10:13
Last Modified:22 Jul 2010 14:25

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