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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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Queens Puzzle
Queen's University
QUEL
query
Query By Example
query expansion
weighted search
ques
Quest
question mark
queue
Queued Sequential Access Method


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