Refine a keyword search using boolean operators.
| Symbol |
Meaning |
Action |
| & |
AND |
Finds only documents containing all of the specific words or phrases. For
example, "otitis & media & toddler" finds documents with
both the words "otitis & media" and the word "toddler". |
| | |
OR |
Finds documents containing at least one of the specified words or phrases.
For example, "otitis | media | toddler" finds documents containing
either "otitis" or " media" or "toddler". The found documents
could contain any word, but does not have to. |
| ! |
AND NOT |
Excludes documents containing the specific word or phrase. For example,
"otitis
! toddlers" finds documents containing "otitis" but not
containing "toddler". As with the & and | operators, ! must appear between
two terms.
|
| [ ] |
Grouping |
Used to group portions of boolean queries together for more complicated
queries. For example, "otitis & [improve |
cure] !vaccinations" finds documents containing "otitis " and either
"improve" or "cure" but not " vaccinations". |