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> The fact that that the Schema for Schemas can not be used for
> validating schemas can be checked here.
> (A reply by Xerces Project Lead Gareth Reakes to my mailinglist post
> on xerces-user-j on apache.org:
That reply is specific to Xerces, and isn't a general statement that applies
to all schema processors.
The Schema for Schemas does one or two things that user-written schemas
aren't allowed to do, like defining new primitive types. A schema processor
will therefore only be able to perform validation using the S4S if it
recognizes it as being privileged. I had to make a few tweaks to the Saxon
schema processor to ensure that this worked, but it works now.
However, you get much stronger validation of a schema by compiling it than
you get by validating it against the S4S, so the question is a little