an operation that follows the rules of boolean algebra; each operand and the result take one of two values
Named after the logician George Boole Boolean Operators are used in search engines and are variables which can either have a value of true or false They are AND, OR, NOT and you can include them in your search phrases For example, instead of expressing a wish to find out about 'the planets' you would say 'planets NOT music'
An operation whose operands and result are of type boolean; in Pascal, one of the operations AND,OR, or NOT
A logical comparison of two values A boolean operation evaluates the expression on the left and the expression on the right to a value of true (usually represented by the digit "1") or false (usually represented by the digit "0") The operation then evaluates the two operands to a value of true or false Boolean operations are commonly used in database search queries Example: 1 AND 0 = False
A method using logic terms to define or restrict the parameters of a search or command Often used by search functions or search engines as a way to create detailed searches, e g "true", "false", "includes", "not", etc