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query expansion

   Also found in: Wikipedia 0.01 sec.
(information science)query expansion - 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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There is an excellent query expansion technique called Local Context Analysis and it is based on the use of expansion concepts, which are noun phrases (group of nouns with of one, two or three adjacent nouns).
Local Context Analysis Techniques (LCA)&Search Engines Optimization ... by sumit1pandey / Business community
Another possibility is to apply additional measures and, for example, index frequent keys or perform query expansion that maps terms to semantically related terms which enables the creation of many key-candidates and increases the probability of finding relevant keys in the global index.
Beyond term indexing: a P2P framework for web information retrieval by Podnar, Ivana; Rajman, Martin; Luu, Toan; Klemm, Fabius; Aberer, Karl / Informatica
The system's ability to recognize the context of the problem by using locality based similarity heuristics and query expansion (with the help of WorldNet).
A fully automatic question-answering system for intelligent search in ... by Gupta, Sumit / International Journal on E-Learning
 
 
 
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