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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:
- Crane camshaft
- finds documents containing 'Crane' or 'camshaft'
- Crane or camshaft
- same as above
- Crane and camshaft
- finds documents containing both 'Crane' and 'camshaft'
- Crane not camshaft
- finds documents containing 'Crane' but not 'camshaft'
- (Crane not camshaft) and ignition
- finds documents containing 'ignition', plus 'Crane' but not 'camshaft'
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