[F&O] IBM-FO-017: Dependency on casting QName to string

(IBM-FO-017) Section 14.1.1, fn:name: Fifth paragraph says that "the value 
returned is an xs:string whose lexical form is an xs:QName."  But it does 
not tell us where this string comes from. Elsewhere, the F&O document 
tells us that there is no way to cast a QName into a string. This is an 
inconsistency in the document.

--Don Chamberlin