Returns true if and only if $arg1 is numerically less than
$arg2.
op:numeric-less-than( $arg1 as xs:numeric,$arg2 as xs:numericxs:booleanGeneral rules: see and .
For xs:float and xs:double values, positive infinity is
greater than all other non-NaN values; negative infinity is less than all
other non-NaN values. If $arg1 or $arg2 is
NaN, the function returns false.