Re: [xml] xml schema api

[Daniel Veillard <veillard redhat com>]

On Sun, Jun 12, 2005 at 05:05:43PM -0700, Yong Chen (yongche) wrote:
> Thanks Daniel. I just re-subscribed to the list. (I subscribed to the list
> before, but somehow it didn't work out).
>
> What I'm looking for is something similar to "xml schema api"
> http://www.w3.org/Submission/2004/SUBM-xmlschema-api-20040122/

 "This specification defines an XML Schema API, a platform- and
  language-neutral interface that allows programs and scripts to
  dynamically access and query the post-schema-validation infoset (PSVI)"

 There is no PSVI information in libxml2 tree at the moment. There is
a placeholder for it but we don't know yet how to best put things in.
Moreover I'm not thrilled by a 45 pages document from IBM describing
Xerces API. All libxml2 schemas APIs are internalized for the moment
for the reasons I exposed. There may still be changes needed internally
to finish conformance (Kasimier has a better view on this than me),
and as we want to add streaming APIs, the notion of PSVI informations
attached to a DOM like node won't fit well in the model.

  Knowing what kind of informations you really want might be a better
first step than to try to see how to reconciliate Xerces API and
libxml2 internals. If you really care, start a Wiki page on xmlsoft.org
look at the internals of libxml2 and start the conversation. At this point
there is near zero chances of something happening soon there if you don't
put some direct work in it. As I stated we have more urgent thing to direct
our attention at in the Schemas field right now. But the process is open
and if you want to make a difference, you can.

Daniel

-- 
Daniel Veillard      | Red Hat Desktop team http://redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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