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RE: TR/xquery-operators/#func-doc

From: <David.Pawson@rnib.org.uk>
Date: Tue, 13 May 2003 10:11:22 +0100
Message-ID: <9B66BBD37D5DD411B8CE00508B69700F049E1780@pborolocal.rnib.org.uk>
To: public-qt-comments@w3.org

Thanks for the long explanation Michael.

I'm either still ignorant, or require convincing.

If I use xml:base, how do I read the stylesheet using document()?
E.g. 
 xml:base = the root of this disk,
 my stylesheet is in directory /xsl

What param is passed to document() to retrieve the stylesheet please?


regards DaveP

ps 
with a variable set to either "" or ''
document($var) fails on both saxon and xalan 1.0 processors.

Another mail I think.



> > http://www.w3.org/TR/xslt20/ 16.1 seems to half answer this,
> > or contradict it.
> > 
> > quote. The effect of these rules is that unless XML entities 
> > or xml:base are used, document("") refers to the document 
> > node of the containing stylesheet module. The XML resource 
> > containing the stylesheet module is processed exactly as if 
> > it were any other XML document, for example there is no 
> > special recognition of xsl:text elements, and no special 
> > treatment of comments and processing instructions. unquote.
> > 
> > Impact on users:
> >   If I want to use xml:base, I can't access the filesheet 
> > using document("")?
> > 
> > I find this unacceptable. 
> > Many people utilise data within the stylesheet as a lookup.
> >
> 
> I think you are misunderstanding the way this worked in XSLT 
> 1.0. There was
> never any special handling of document(""). It worked because 
> "" is a legal
> relative URI, which was resolved relative to the base URI of 
> the stylesheet,
> and would therefore retrieve the XML entity containing the call on
> document(""). This was a happy consequence of the 
> specification, which was
> mentioned in a note, though the note unfortunately failed to 
> mention that it
> only worked if the call was contained in the document entity of the
> stylesheet module. In XSLT 2.0 we now support xml:base; 
> xml:base changes the
> meanings of relative URIs in a document, including the meaning of the
> relative URI "". It's reasonable that the spec should warn 
> you of this.
> > 
> > 
> > 2. Is there another out of sync issue here?
> > xslt 2 says:
> > 
> > document($uri-sequence as item()*, $base-node as node()) as node()*
> > 
> > which is missing from the former reference?
> > 
> 
> By "the former reference" do you mean the fn:doc() function 
> in Functions and
> Operators? This doesn't have a second argument, because it 
> doesn't need one.
> There is now a function fn:resolve-uri() that allows you to 
> resolve relative
> URIs against absolute URIs in any way you choose; this is far 
> more flexible
> than the limited capabilities of the old document() function, 
> so there is no
> need to carry these capabilities forward into the new 
> fn:doc() function.
> 
> The equivalent of:
> 
>    fn:document(concat(@a, '.xml'), @a)
> 
> using the new function is:
> 
>    fn:doc(resolve-uri(concat(@a, '.xml'), base-uri(@a)))
> 
> (This might be longer, but in my experience the second argument of
> document() is very rarely used).
> 
> Michael Kay
> 

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Received on Tuesday, 13 May 2003 05:11:52 GMT

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