Refine a keyword search using boolean operators.
|
Symbol
|
Meaning
|
Action
|
| & |
AND |
Finds only documents containing all of the specific words or phrases. For example, "facelift &aging" finds documents with both the word "facelift" and the word "aging". |
| | |
OR |
Finds documents containing at least one of the specified words or phrases. For example, "facelift | aging" finds documents containing either "facelift" or "aging". The found documents could contain both, but do not have to. |
| ! |
AND NOT |
Excludes documents containing the specific word or phrase. For example, "facelift ! aging" finds documents containing "facelift" but not containing "aging". 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, "facelift & [aging | men] ! liposuction " finds documents containing "facelilft" and either "aging" or "men" but not "liposuction". |