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Examples:
- information retrieval
- finds documents containing 'information' or 'retrieval'
- information or retrieval
- same as above
- information and retrieval
- finds documents containing both 'information' and
'retrieval'
- information not retrieval
- finds documents containing 'information' but not
'retrieval'
- (information not retrieval) and WAIS
- finds documents containing 'WAIS', plus 'information'
but not 'retrieval'
- web*
- finds documents containing words starting with 'web'
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Query language:
The text
search engine allows queries to be formed from
arbitrary Boolean expressions containing the keywords AND,
OR, and NOT, and grouped with parentheses.
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