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' |
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