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