Query Expansion of Zero-Hit Subject Searches: Using a Thesaurus in Conjunction with NLP Techniques

The focus of our study is zero-hit queries in keyword subject searches and the effort of increasing recall in these cases by reformulating and, then, expanding the initial queries using an external source of knowledge, namely a thesaurus. To this end, the objectives of this study are twofold. First,...

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Bibliographic Details
Published inLecture notes in computer science pp. 433 - 438
Main Authors Kapidakis, Sarantos, Mastora, Anna, Peponakis, Manolis
Format Book Chapter
LanguageEnglish
Published Berlin, Heidelberg Springer Berlin Heidelberg 2012
SeriesLecture Notes in Computer Science
Subjects
NLP techniques
Query expansion
Thesaurus
Zero-hit queries
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ISBN9783642332890
3642332897
ISSN0302-9743
1611-3349
1611-3349
DOI10.1007/978-3-642-33290-6_48

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Summary:The focus of our study is zero-hit queries in keyword subject searches and the effort of increasing recall in these cases by reformulating and, then, expanding the initial queries using an external source of knowledge, namely a thesaurus. To this end, the objectives of this study are twofold. First, we perform the mapping of query terms to the thesaurus terms. Second, we use the matched terms to expand the user’s initial query by taking advantage of the thesaurus relations and implementing natural language processing (NLP) techniques. We report on the overall procedure and elaborate on key points and considerations of each step of the process.
ISBN:9783642332890
3642332897
ISSN:0302-9743
1611-3349
1611-3349
DOI:10.1007/978-3-642-33290-6_48