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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:
| Search for... |
Results... |
| 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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