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| Query
Language - Boolean Searches |
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'
- 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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Boolean Search Tips
