[XML-SIG] how to check "grammar" of xml using a schema or DTD withelementtree

[Stephane Bortzmeyer]

On Thu, Nov 16, 2006 at 01:33:46PM -0800,
 Margie Levine <margie.levine at amd.com> wrote 
 a message of 54 lines which said:

> Are the validations tools you use freely available or are these
> things that you've written?

To validate against Relax NG schemas, there are at least two free
programs (the implementation of RelaxNG in 4suite is very limited, I
suggest not using it):

http://www.davidashen.net/rnv.html

xmllint in http://xmlsoft.org/