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Refining Non-Taxonomic Relation Labels with External Structured Data to Support Ontology Learning

Weichselbraun, Albert and Wohlgenannt, Gerhard and Scharl, Arno (2010) Refining Non-Taxonomic Relation Labels with External Structured Data to Support Ontology Learning. Data & Knowledge Engineering, 69 (8). pp. 763-778. ISSN 0169-023X

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Official URL: http://dx.doi.org/10.1016/j.datak.2010.02.010

Abstract

This paper presents a method to integrate external knowledge sources such as DBpedia and OpenCyc into an ontology learning system that automatically suggests labels for unknown relations in domain ontologies based on large corpora of unstructured text. The method extracts and aggregates verb vectors from semantic relations identified in the corpus. It composes a knowledge base which consists of (i) verb centroids for known relations between domain concepts, (ii) mappings between concept pairs and the types of known relations, and (iii) ontological knowledge retrieved from external sources. Applying semantic inference and validation to this knowledge base yields a refined relation label suggestion. A formal evaluation compares the accuracy and average ranking precision of this hybrid method with the performance of methods that solely rely on corpus data and those that are only based on reasoning and external data sources.

Item Type:Article
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:18
Deposited By: Dr Albert Weichselbraun
Deposited On:03 Aug 2010 06:21
Last Modified:03 Aug 2010 06:21

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