Returns true if the first argument is true and the second is false.
xs:boolean
values. Also
used in the definition of the "le" operator.op:boolean-greater-than
( $arg1
as xs:boolean
,$arg2
as xs:boolean
xs:boolean
The function call op:boolean-greater-than($A, $B)
is defined to return the
same result as op:boolean-less-than($B, $A)