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RE: Validation API, was: Regarding the vote on XML Schema.

> -----Original Message-----
> From: Wayne Steele [mailto:xmlmaster@hotmail.com]
> Sent: 24 April 2001 20:37
> To: Tony.Coates@reuters.com; xml-dev@lists.xml.org
> Subject: Re: Validation API, was: Regarding the vote on XML Schema.
> I think this discussion has happened before.
> IIRC, the consensus was that more is needed than a 'pluggable validator'
> API; each schema technology brings its own infoset contributions.

For reference, I covered the recent "Schemarama" discussions in the
Deviant column [1].

Francis Norton also recently announced an updated demo of using XSD and
Schematron together [2].

Roger Costello's ExtendingSchemas page [3] also covers some related

> I think people are still trying to narrow down what these 'infoset
> contributions' are, and what they look like. Then we can talk about an
> architecture for providing them.

Well the XSD contributions seem to be the base infoset [4] plus these
contributions [5]

One question that might be worth considering is: of these contributions
could also be made by DTD/TREX/RELAX validation instead?

Another might be: of the proposed revisions to XSLT and XPath which infoset
contributions are required?

btw. Is there a more formal description of the PSVI in the XSD specs than
that given in [5]?

[1]. http://www.xml.com/pub/a/2001/02/07/schemarama.html
[2]. http://www.geocrawler.com/lists/3/SourceForge/6317/0/5609083/
[3]. http://www.xfront.com/ExtendingSchemas.html
[4]  http://www.w3.org/TR/xml-infoset/
[5]. http://www.w3.org/TR/xmlschema-1/#PSVI_contributions