| Query LanguageThe 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 listingfinds documents containing 'information' or 'listing'
 
information or listingsame as above
 
information and listingfinds documents containing both 'information' and 'listing'
 
information not listingfinds documents containing 'information' but not 'listing'
 
(information not listing) and UCASfinds documents containing
          'UCAS', plus 'information'
            but not 'listing'
 
web*finds documents containing words starting with 'web'
          
         |