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