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:

 military intelligence

finds documents containing 'military' or 'intelligence'

military and intelligence

finds documents containing both 'military' and 'intelligence'

biomedical not catheter

finds documents containing 'biomedical' but not 'catheter'

(biomedical not catheter) and stent

finds documents containing 'stent', plus 'biomedical' but not 'catheter'

robotic*

finds documents containing words starting with 'robotic'