Re: [xml] support for xslt functions in xmllint schematron?

[Daniel Veillard <veillard redhat com>]

On Thu, Nov 02, 2006 at 05:10:06PM +0000, Nic James Ferrier wrote:
> Daniel Veillard <veillard redhat com> writes:
> 
> >   If schematron really depends on XSLT support (bad IMHO) then it need to be
> > removed from libxml2, and either made part of libxslt or another library.
> > Definitely not a small change, my punition again for attempting to implement
> > a spec which wasn't completely formalized (or for which the formal final
> > spec was not available to mere mortals)...
> >   Deadlock, as part of libxml2 this is not solvable, best way forward to really
> > implement that would be to start deprecating libxml2 Schematron implementation
> > and move it to another module. Probably not the best way to promote the spec.
> > And if there is really a hard XSLT dependancy then sticking to a stylesheet
> > based implementation (which should work with xsltproc) sounds the
> > simplest.
> 
> If it's only a few functions could we just reimplement them in
> libxml2's xpath?

  Some of them are fairly tied to the XSLT infrastructure
    http://www.w3.org/TR/xslt#add-func
and clearly key() for example would not be reusable in that context.
I would not be able to add them to basic libxml2 XPath, it really should
only see the normal XPath-1.0 function (or if xslt with a namespace
which would just not work with direct generate-id() use). Those would
have to be copied in the schematron module and registered when creating
the validation context' XPath context.

  So which functions ?

Daniel

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