bug deriving types across schemas

[Andrew Newton <an...@research.netsol.com>]

I believe I have come across a bug when deriving types
across schemas in 1.3.0.

Attached are some test files.

this works:
1- foo.xsd describes a schema with a base type
2- bar.xsd describes a schema with a derived type
3- foo.xml is an instance document that works.

this throws a CMException:
4- barTwo.xsd describes a schema with a derived type.
   The only difference is that instead of deriving
   by "restriction", it is deriving by "extension".
5- fooTwo.xml is an instance document demonstrating
   the failure.

I also noted that this exception is not thrown when
the derived type is in the same namespace as the base
type.  And I noticed that if the base type has a
complex content model that is not empty, the exception
is not thrown.

-Andy

-- 
Andrew Newton
anewton@research.netsol.com