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not
Logical negation
not (negand)- value (Boolean):(Mandatory)
Example: not (true)
Result: false
Example: not (false)
Result: true
is
Returns the Boolean value whether two values are equal or not. Two values are considered equal if they are of the same type and have the same value.
is (value1, value2)- value1 and value2. (Mandatory): Both are elements of the same type and have the same value
Example: is( time( "23:00:50z" ), time( "23:00:50+00:00" ) )
Result: true
Example: is( date( "2012-12-25" ), time( "23:00:50" ) )
Result: false