Re: Use of QName forcing declaration "Unused" namespaces

If the QNames are names of elements in the source document, then you shouldn't be calling name() to get the lexical QName, and then calling xs:QName to turn it back into an xs:QName value, because that loses information (specifically, the namespace bindings that were in scope in the source document). Instead, you should use the node-name() function to get the name as an xs:QName value in the first place.

I may have misunderstood what's going on here, but I think this is the heart of the issue: if you're going to manipulate QNames, then you need to get them out of lexical format and into structured xs:QName format as early as possible, while the original namespace bindings are still known.

Michael Kay
Saxonica

> On 21 Jul 2020, at 15:02, Ihe Onwuka <[email protected]> wrote:
> 
> Every element in my input doc is in one of  5 namespaces that I have declared globally in the stylesheet. However the stylesheet as written never explicitly references any of the 5 namespaces so  I would like to genericize it by doing away with the namespace declarations. 
> 
> However if I remove any one of the namespaces I get this error.
> 
> Error at char 79 in expression in xsl:sequence/@select on line 14 column 118 of ***.xsl:
>   FONS0004  Namespace prefix {jx} has not been declared
> at function local:localizedName on line 12 of ***.xsl:
> 
> Here is the function local:localizedName which is designed to return  a local name from a QName or a string.
> 
> <xsl:function name="local:localizedName" as="xs:string?">
>       <xsl:param name="name"/>
>       <xsl:sequence select="local-name-from-QName(if ($name instance of xs:QName) then $name else xs:QName($name))"/>	     
>    </xsl:function>
> 
> It seems that casting anything as QName mandates that the namespace prefix in whatever is being cast must be declared , even if it's not explicitly referenced. 
> 
> e.g xs:string(xs:QName($someName)) will fail if $someName contains 'ab:cde' and you haven't declared the ab prefix anywhere (even if you don't otherwise use it).
> 
> In which case my goal is better achieved by eradicating the QNames and resorting to string manipulation to extract the local part of the name. 
> 
> Comments, observations, corrections please. 
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