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Extraction of Definitional Contexts using Lexical Relations

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International Journal of Computer Applications
© 2011 by IJCA Journal
Volume 34 - Number 6
Year of Publication: 2011
Authors:
Olga Acosta
Gerardo Sierra
César Aguilar
10.5120/4121-5982

Olga Acosta, Gerardo Sierra and Cesar Aguilar. Article: Extraction of Definitional Contexts using Lexical Relations. International Journal of Computer Applications 33(6):46-53, November 2011. Full text available. BibTeX

@article{key:article,
	author = {Olga Acosta and Gerardo Sierra and Cesar Aguilar},
	title = {Article: Extraction of Definitional Contexts using Lexical Relations},
	journal = {International Journal of Computer Applications},
	year = {2011},
	volume = {33},
	number = {6},
	pages = {46-53},
	month = {November},
	note = {Full text available}
}

Abstract

In this paper we present a method for automatically extracting definitional contexts from restricted domains in Spanish. Definitional contexts are textual fragments where there is an implicit definition that can be identified by taking into account verbal patterns linking a term and its corresponding definition. Our interest is in definitional contexts with analytical definitions. Therefore, we focus on the extraction of textual fragments with a term and a hypernym. Then, hypernym is used for filtering non-relevant contexts by means of the occurrence frequency. It is assumed most frequent hypernyms have a higher probability of giving true definitional contexts than those less frequent hypernyms. We captured regularity in analytical definitions by means of a chunk grammar. This method achieves acceptable results in precision and recall compared with other works.

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