query expansion

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query expansion

(information science)
Adding search terms to a user's search. Query expansion is the process of a search engine adding search terms to a user's weighted search. The intent is to improve precision and/or recall. The additional terms may be taken from a thesaurus. For example a search for "car" may be expanded to: car cars auto autos automobile automobiles.

The additional terms may also be taken from documents that the user has specified as being relevant; this is the basis for the "more like this" feature of some search engines.

The extra terms can have positive or negative weights.
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Sonia haiduc, Gabriel Bavota, 2013] reported that using automatic query reformulation for text retrieval in software engineering.
Automatic Query Reformulations for Text Retrieval in Software Engineering, ICSE 2013, San Francisco, CA, USA, 978-1-4673-3076-3/13/2013 IEEE.

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