Qualifier | What it does | Example | Result |
NEAR | Matches terms which are near to another terms | grapefruit NEAR herbaceous | T if g is less than 10 words from h |
ADJ | Matches only if the first search term occurs before the second | grapefruit ADJ herbaceous | T if g is found before h |
AND | Matches articles where both search term match | grapefruit AND herbaceous | T if both g and h are found |
OR | Matches articles where either expressions match | grapefruit OR herbaceous | T if g or h are found |
() | Constrains the evaluation order | (grapefruit AND herbaceous) OR subtropics | T if g and h are found, or if s is found |
NOT | Logical NOT (T becomes F, F becomes T) | NOT (grapefruit AND herbaceous) | F if g and h are found |
XOR | Matches if the first or second expression match, but not both | grapefruit XOR herbaceous | T if g or h are found, but F if both are found |