[xsd-users] Multiple schemas with the same namespace, compiled into a library

[Tony McConnell]

Boris, if you could do that, that would be great!

Thanks

Tony


On Mon, Apr 8, 2013 at 3:29 PM, Boris Kolpackov <boris at codesynthesis.com>wrote:

> Hi Tony,
>
> Tony McConnell <amnw14545 at googlemail.com> writes:
>
> > However, I get a strange message: type '' is not derived from ''
>
> I took a look at your test and I see your schemas use polymorphism.
> The problem is that there is only one map that maps type names (as
> appear in xsi:type in your XML documents) to C++ types that will be
> instantiated.
>
>
> > If my object files are linked into the library in order t1.o, t2.o, I get
> > the error when parsing t2.xml
> >
> > If my object files are linked into the library in order t2.o t1.o, I get
> > the error when parsing t1.xml
>
> The link order determines which schema "wins" registering its type
> information in the above mentioned map.
>
>
> > Please could someone tell me what type '' is not derived from '' means?
>
> This error means that a supposedly derived type is actually not derived
> from the expected base. I am pretty sure it is caused by the "registration
> race".
>
> The XSD runtime actually has a mechanism for creating multiple set of
> maps (called "plates"). It's just that the XSD compiler doesn't expose
> this and always uses plate 0. If you would like, I can add an option to
> the XSD compile to allow one to specify the plate number to use. With
> this support you can then place each schema on its own plate, just like
> you are already mapping them to their own C++ namespaces.
>
> Boris
>