Query expansion using lexical-semantic relations
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ISWC'06 Proceedings of the 5th international conference on The Semantic Web
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Query expansion of zero-hit subject searches: using a thesaurus in conjunction with NLP techniques
TPDL'12 Proceedings of the Second international conference on Theory and Practice of Digital Libraries
An incremental construction method of a large-scale thesaurus using co-occurrence information
International Journal of Computer Applications in Technology
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It is common practice in audiovisual archives to disclose documents using metadata from a structured vocabulary or thesaurus. Many of these thesauri have limited or no structure. The objective of this paper is to find out whether retrieval of audiovisual resources from a collection indexed with an in-house thesaurus can be improved by enriching the thesaurus structure. We propose a method to add structure to a thesaurus by anchoring it to an external, semantically richer thesaurus. We investigate the added value of this enrichment for retrieval purposes. We first anchor the thesaurus to an external resource, WordNet. From this anchoring we infer relations between pairs of terms in the thesaurus that were previously unrelated. We employ the enriched thesaurus in a retrieval experiment on a TRECVID 2007 dataset. The results are promising: with simple techniques we are able to enrich a thesaurus in such a way that it adds to retrieval performance.