Re: [xml-dev] is an xml:id attribute a "DTD-determined ID"?

[Mike Sokolov <sokolov@ifactory.com>]

Yes - I was hoping you would pick up this thread. So, I'm not sure I 
understood your response.  I guess my basic question is whether it is 
feasible to use xpointer="element(<id-value>)" with Xerces (as it seems 
from the FAQ), and if so, what needs to be in place for that to work.  I 
understand the ids needs to be recognized as such, but I'm a little 
unclear on how to make that happen.

I did think (naively, perhaps), that xml:id was just automatically 
recognized as having type "ID" by virtue of its special nature.

Then I thought perhaps it is necessary to validate (with a DTD) in order 
to get that fact identified (I think this seems to be what you're 
saying), so I enabled validation.  But my xpointer references are still 
failing.  If you can confirm that this *should* work, then I will assume 
the parser isn't actually validating as I thought.

-Mike

Michael Glavassevich wrote:
>
> john.l.clark@gmail.com wrote on 09/16/2009 02:20:49 PM:
>
> > Mike,
> >
> > On Wed, Sep 16, 2009 at 2:04 PM, Mike Sokolov <sokolov@ifactory.com> 
> wrote:
> > > Question: is xml:id considered a "DTD-determined ID" according to 
> the XProc
> > > spec?  I read it, and found this sentence:
> > >
> > > [Definition: An attribute information item is a DTD-determined ID 
> if and
> > > only if it has a [type definition] property whose value is equal 
> to ID.]
> > >
> > > I think that's true of xml:id, but would like it if someone more
> > > knowledgeable could confirm or deny
> >
> > It sure is.  See <http://www.w3.org/TR/xml-id/#dt-id-assignment>,
> > which I think is pretty clear on that.
>
> ... only if an xml:id processor did that assignment. The attribute 
> itself doesn't magically have that property.
>
> > Take care,
> >
> >     John L. Clark
> >
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> Michael Glavassevich
> XML Parser Development
> IBM Toronto Lab
> E-mail: mrglavas@ca.ibm.com
> E-mail: mrglavas@apache.org
>