Kapidakis, Sarantos , Mastora, Anna and Peponakis, Manolis . Query Expansion of Zero-Hit Subject Searches: Using a Thesaurus in Conjunction with NLP Techniques., 2012 In: Theory and practice of digital libraries : second International Conference, TPDL 2012, Paphos, Cyprus, September 23-27, 2012. Proceedings. Springer, pp. 433-438. [Book chapter]
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English abstract
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.
Item type: | Book chapter |
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Keywords: | Query expansion, Thesaurus, Zero-hit queries, Natural Language Processing (NLP) techniques |
Subjects: | L. Information technology and library technology > LL. Automated language processing. L. Information technology and library technology > LR. OPAC systems. |
Depositing user: | Manolis Peponakis |
Date deposited: | 13 Nov 2013 12:49 |
Last modified: | 02 Oct 2014 12:29 |
URI: | http://hdl.handle.net/10760/20656 |
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