Re: [xml-dev] Rick Jelliffe on designing XML Schemas in a way that suppo

["G. Ken Holman" <gkholman@CraneSoftwrights.com>]

At 2012-08-19 23:14 +0100, Fraser Goffin wrote:
>The most obvious example of which is used by UBL which promotes this
>approach for 'value based' validation (which isn't restricted simpy to
>enums and can be quite successfully used for any information item).
>UBL actually takes things a little further and caters not only for
>dealing with multi-version validation but also context based
>validation too (i.e. different subsets that apply to different
>locations within the instance).
>
>Ken Holman may be along shortly to correct my clumsy description.

I have nothing to add, Fraser, that was said quite well.

>That said, if Rick was using enums as just one possible use case for
>schema volatility where schematron could play a role, and there are
>others, then as Roger suggests, it is a topic that many are interested
>in and probably deserves another outing.

Schematron does play a role in the UBL scenario you've described, as 
I've published for free download an environment that converts the 
combination of OASIS Context/Value Association and OASIS Genericode 
into a synthesized Schematron expression that can then be converted 
into XSLT (or any other implementation of Schematron; the XSLT 
implementation is included in the distribution):

   genericode 1.0 - lists of codes with list-level and value-level meta data

     http://docs.oasis-open.org/codelist/ns/genericode/1.0/

   context/value association using genericode 1.0
                  - contextual code list usage and instance-level meta data

     http://docs.oasis-open.org/codelist/ns/ContextValueAssociation/1.0/

   Schematron implementation of CVA files for validation

     http://www.CraneSoftwrights.com/resources/ubl/index.htm#codelist

The OASIS UBL distribution includes XSLT that is generated using this package.

I hope this helps.

. . . . . . . . . . . . . Ken


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