Re: [xml-dev] Perplexing Invalid Schema

[Timothy Cook <timothywayne.cook@gmail.com>]

On Tue, Sep 11, 2012 at 11:44 AM, Michael Kay <mike@saxonica.com> wrote:
>
> Saxon is rejecting the schema because type X is not a restriction of type
> Any; it is derived from Any, but some of the derivation steps involve
> Extension.
...
>
> 1 If B and D are not the same type definition, then the {derivation method}
> of D must not be in the subset.
>
> But the subset includes "extension", so derivation by extension isn't
> allowed; therefore it isn't a valid restriction.
>

Thanks for a great explanation.
I guess I should have been using Saxon when I started this project.  :-)

So, is there a way to group complexTypes similar to substitutionGroups
for elements?  Or is there some other way that people use to model an
object-oriented approach using schemas?

Regards,
Tim


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