[XML-SIG] DTD? Schemas? RELAX? Try Schematron

[Uche Ogbuji]

Since everyone is weighing in with their favorite schema technology, I'll 
mention that I _really_ like Rick Jelliffe's Schematron

http://www.ascc.net/xml/resource/schematron/schematron.html

Rick is on the W3C Schema group, so he'd never outright say it is out of 
control, but actions speak louder than words and he's provided a much saner 
approach to the problem.

Schematron simply harnesses the enormous power of XSLT to make assertions 
about a document, providing a very flexible approach to the rules, output and 
style of validation.  Best of all, since there is a basic implementation in 
XSLT, it's already here for Python using 4XSLT.  We've used it this way in a 
production project (validation was not required for every XML document access).


-- 
Uche Ogbuji                               Senior Software Engineer
uche.ogbuji@fourthought.com               (303)583-9900 x 101
Fourthought, Inc.                         http://Fourthought.com 
4735 East Walnut St, Ste. C, Boulder, CO 80301-9036
Software-engineering, knowledge-management, XML, CORBA, Linux, Python