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

Fredrik Lundh fredrik at pythonware.com
Thu Nov 16 15:58:48 CET 2006

Margie Levine wrote:

> Right now I am using elementtree to check this within my program.  IE, I
> traverse the tree and make sure the xml meets the specifications.  Based
> on my reading, it seems that I can use a DTD or scheme to define the
> "grammar" of my xml, but I can't figure out how to actually set this up.
> It seems like I should just be able to specify my DTD or Schema and then
> call ElementTree's parse method and Elementtre should just give me
> errors if the xml doesn't conform to the rules.  Maybe Elementtree just
> doesn't support this?  I see some doc that says lxml supports schema's,
> will lxml do this for me?

basic ET only does well-formedness checks; lxml comes with validation support
for DTD:s, schemas, and Relax NG.

> What are other folks doing to deal with this?

well, I'm using separate validations tools as part of the test suite, and I'm then
assuming that my code doesn't actually mess itself up when running...


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