[F&O] IBM-FO-036: Inconsistent parameter types

(IBM-FO-036): Section 15.1.13 (fn:subsequence): This section says that 
$startingLoc has type xs:double. But in Sections 15.1.10 
(fn:insert-before) and 15.1.11 (fn:remove), the type of $location was 
xs:integer. What is the reason for this inconsistency?

--Don Chamberlin