On Fri, Jan 29, 2010 at 12:48:06PM +0100, Piotr Bański wrote:
> Hi Daniel,
> 
> A minor xptr/element()-spec-related point:
> 
> On 2010-01-29 11:45, Daniel Veillard wrote:
> > On Fri, Jan 29, 2010 at 12:26:41AM +0100, [email protected] wrote:
> >> Hi,
> >>
> >>  I'm using xinclude with xpointer element()-scheme to include an existing 
> >> element of the same resource at a different location. The following 
> >> bar.xml gives an example. In cruft-element with ID "c4" I'm including 
> >> <fnac>a</fnac>. In cruft-element with ID "c5" I'm trying to include 
> >> <fnac>b</fnac>. In cruft-element "c6" I'm trying to include <fnac>c</fnac> 
> >> and added therefore a href="bar.xml" to avoid any "Resource Error". I'm 
> >> doing all this with IDs defined in bar.xsd. Here comes the complete 
> >> example:
> >>
> >> <bar xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> >> xmlns:xi="http://www.w3.org/2001/XInclude";
> >> xsi:noNamespaceSchemaLocation="bar.xsd">
> >> <fnorb id="snip">
> >> <cruft id="c1"><fnac>a</fnac></cruft>
> >> <cruft id="c2"><fnac>b</fnac></cruft>
> >> <cruft id="c3"><fnac>c</fnac></cruft>
> >> <cruft id="c4"><xi:include xpointer="element(/1/1/1/1)"/></cruft>
> >> <cruft id="c5"><xi:include xpointer="element(c2/1)"/></cruft>
> >> <cruft id="c6"><xi:include href="bar.xml" 
> >> xpointer="element(c3/1)"/></cruft>
> >> </fnorb>
> >> </bar>
> > 
> >   xmllint doesn't do ID ness for XSD based validation as far as I know,
> > at least not by default whe XIncluding it so your ID won't be found that
> > way ! Use xml:id it was designed exactly for that.
> > 
> >   Also your second and 3rd espressions are wrong, element(c2/1) will
> > look for an element named c2 not for an element with an ID of c2.
> > use id() or @id constructs.
> 
> The element() scheme allows for a shorthand pointer as the first step,
> so 'element(c2)' is equivalent to 'xpointer(id(c2))' (and '#element(c2)'
> is equivalent to '#c2'). I'm talking about the W3C spec, maybe it's
> "wrong" for xmllint, but I seem to recall it working, though I can't
> verify that right now.

  Ah, right it's element() not xpath() ... yes it does it, but
as stated you won't get any IDE from a linked XSD. Use xml:id attribute
or the xpath() based xpointer.

Daniel

-- 
Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
[email protected]  | Rpmfind RPM search engine http://rpmfind.net/
http://veillard.com/ | virtualization library  http://libvirt.org/
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