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Query Language

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:

information resources

finds documents containing 'information' or 'retrieval'

information or resources

same as above

information and resources

finds documents containing both 'information' and 'resources''

information not resources

finds documents containing 'information' but not 'resources'

(information not resources) and retrieval

finds documents containing 'retrieval', plus 'information' but not 'resources'

web*

finds documents containing words starting with 'web'