XML validation shouldn't require Jing; should use other tools if available.

validator.py including RelaxNG-class

If you want to try this, but only have RelaxNG-Compaxt files consider using http://www.gnosis.cx/download/relax/. Perhaps this could be put into the validator (it's python) to convert the file on the fly (with caching), but I don't need it myself.

Update follows:

• RelaxNG-Errors got a different Errormessage
• Deleted unneeded import (escape)

validators.py including RelaxNG-class

We are trying to ship a reasonably minimal set of validators in core (and to keep external dependencies down). Obviously that isn't a perfectly consistently applied policy, since some validators from the pre-history of Django's development are available. But we are trying to be more consistent these days.

However, this does look like a useful validator for some projects. I would suggest adding a new wiki page linked from CookBookValidators or a pointer to an external site on that page so that people who would like to use this can have access to it.

Thanks for writing this validator.

The current XML validator relies on Jing, which is even *more* of a pain to install than lxml (GJC.... ugh). I think the right approach is to refactor the XML validator to use a series of backends to try validation -- lxml if available, jing if available and if you're using RNG-Compact, and finally minidom for basic well-formedness.

I'm gonna steal this ticket for that issue since this lxml validator is a good place to start.

Also see #5703 for a validator using RNV. I'm wondering if we might want to have some sort of "registry" for XML validation methods; there seem to be a bunch, all with their own good use cases.

As this ticket seems to get attention again I uploaded a current version of my validator, supporting both newforms and oldforms. As sample of an XmlField? for newforms is included, but commented out. Hope this helps getting things forward. ;-)