Re: [xml-dev] Four things that I've recently learned

[George Cristian Bina <george@oxygenxml.com>]

Hi Roger,

Costello, Roger L. wrote:
> [...] 
> 
> 4. Multiple validations on the data should be the norm, not the
> exception.
> 
> Also known as "concurrent validation."  Grammar-based validation using
> XML Schema or Relax NG is rarely (if ever) sufficient for checking all
> your data constraints.  Rule-based validation, using Schematron, is
> typically needed for checking co-constraints, cardinality checks, and
> algorithmic checks.  The tandem of a grammar-based validation and
> Schematron validation should be the norm.

DocBook 5 already provides that, it ships with an NVDL script that 
validates against a Relax NG schema and against a Schematron schema.

Best Regards,
George
--
George Cristian Bina
http://www.oxygenxml.com