Section 16.2.6 contains the following code section:

               let $SWEDISH := "http://www.w3.org/..../collation?lang=se"
               return fn:sort($in, $SWEDISH)

This would be better indented to the left:

let $SWEDISH := "http://www.w3.org/..../collation?lang=se"
return fn:sort($in, $SWEDISH)

Also, the URI is not a proper URI, is that intentional? The text does not explain it, in fact, the text suggests the URI is a proper collation URI.