Re: [xml] XInclude fallback and missing root element

[Daniel Veillard <veillard redhat com>]

On Thu, Nov 23, 2006 at 06:50:39PM +1100, Michael Day wrote:
> Hi,
> 
> Funny things can happen when XInclude processing is run on a document 
> that has an include as the root element. For example:
> 
>      <xi:include xmlns:xi="http://www.w3.org/2003/XInclude";
>        href="no-such-file.xml">
>          <xi:fallback>Foo.</xi:fallback>
>      </xi:include>
> 
> Running "xmllint --xinclude" on this document produces this output:
> 
>      <?xml version="1.0"?>
> 
>      Foo.
> 
> Which doesn't look like well-formed XML to me. Manipulating the document 
> with the tree functions will find that there is no root element in this 
> document at all after XInclude processing has taken place. Seems a bit odd!
> 
> Is there something better that libxml2 could do in this situation? Or is 
> this a gap in the XInclude specification?

Paragraph 3 of section 4.5:
  http://www.w3.org/TR/xinclude/#creating-result
------------------------------------------
It is a fatal error to attempt to replace an xi:include element appearing
as the document (top-level) element in the source infoset with something
other than a list of zero or more comments, zero or more processing
instructions, and one element.
------------------------------------------

I guess it's a bug in libxml2 implementation :-)

Daniel

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