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This 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: |
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| colonial history | finds documents containing 'colonial' or 'history' |
| colonial or history | same as above |
| colonial and history | finds documents containing both 'colonial' and 'history' |
| colonial not history | finds documents containing 'colonial' but not 'history' |
| (colonial not history) and revolution | finds documents containing 'revolution', plus 'colonial' but not 'history' |
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finds documents containing words starting with 'web' |