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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:
- digger kubota
- finds documents containing 'digger' or 'kubota'
- digger or kubota
- same as above
- digger and kubota
- finds documents containing both 'digger' and 'kubota'
- digger not kubota
- finds documents containing 'digger' but not 'kubota'
- (digger not kubota) and excavator
- finds documents containing 'excavator', plus 'digger' but not 'kubota'
- web*
- finds documents containing words starting with 'web'
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