> In GNU JAXP there is a pipeline interface called ValidationConsumer that
> handles DTD validation layered cleanly on top of SAX. So you can apply the
> best validator to the best parser (assuming you are talking the same
> language). Also, I believe RNG has a layered SAX validator. Maybe this
> wasn't the point... but it is layered. The fundamental checks for
> wellformedness however are not-- but SAX was designed for XML 1.0/1.1 there
> should be no surprise that wellformedness is a must for it.
I don't think complete validation is possible on top of SAX.
AFAIR, there are a few entity related validity constraints that
cannot be checked through SAX.
Karl
