Schema compile/validate problems in .NET 2.0

Hello,

We are developing an application which is based on a complex set of XML
schemas (several dozen schemas in all). The schemas themselves are
based on the IS standard, with a few extensions and changes for
our purposes. Some of the changes are done using xs:redefine. The set
of schemas validates perfectly using oXygen version 8 and the Xerces
engine. The application is developed using Visual Studio on the .NET
2.0 platform. The problem is, when I try to load the root schema into a
NET XMLSchemaSet object and call the Compile method, it throws about 16
validation exceptions. Some describe duplicate definitions of elements
or types, some complain about invalid xs:redefine usage. It has thrown
us a bit that oXygen does not report anything, but .NET will not accept
these schemas. Even if I try to load the unmodified IS schema
set, .NET reports 3 errors which again, oXygen does not.

Anybody know what is going on here? Is .NET more stringent in its
validation than oXygen? Even if we ask oXygen to use the MSXML.NET
engine to validate them, we get different results. It's difficult to
post any of the schema info, because there is a total of well over a
megabyte of it. Initially we'd just like to know if anyone has come up
against this sort of problem, and more important, has found a way
through it.

Thanks and regards
Steve Marshall


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