The text search engine allows queries to be formed from arbitrary Boolean expressions containing the keywords AND, OR, and NOT, and grouped with parentheses, as well as the 'wildcard' *. For example:
- words numbers
- finds documents containing 'words' or 'numbers'
- words or numbers
- same as above
- words and numbers
- finds documents containing both 'words' and 'numbers'
- words not numbers
- finds documents containing 'words' but not 'numbers'
- (words not numbers) and other stuff
- finds documents containing 'other stuff', plus 'words' but not 'numbers'
- web*
- finds documents containing words starting with 'web'
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