Query language

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: > ====cervix radiotherapy:==== > ====finds documents containing 'cervix' or 'radiotherapy==== > > cervix or radiotherapy:

same as above

• • cervix and radiotherapy:

finds documents containing both 'cervix' and 'radiotherapy'

• • cervix not radiotherapy:

finds documents containing 'cervix' but not 'radiotherapy'

• • (cervical not radiotherapy) and hyperbaric:

finds documents containing 'hyperbaric', plus 'cervix' but not 'radiotherapy'

• • cerv*:

finds documents containing words starting with 'cerv', e.g., cervix and cervical

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