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Rules
Allowed comparison operators: AND, OR, AND NOT
Additional characters: Double-quotes for phrases, parentheses for grouping
AND takes precedence over OR
Criteria with missing comparison operators is assumed to be AND
Your search criteria cannot start with an operator
Wildcards are not necessary, if you search for
biolo
you'll get results for both
biolo
gy and
biolo
gical.
Examples
A
AND
(B
OR
C)
A
AND NOT
(B
OR
C)
A (B
OR
C) is interpreted as A
AND
(B
OR
C) since there is no operator before the parentheses
Phrases: "molecular biology"
AND
(B
OR
C)
AND NOT
(D
OR
E)