XSD Im****t

Hi All,
I have few schemas which need to be used in a main schema.

SchemaA, SchemaB, SchemaC need to be used in SchemaMain

I use XSD Include to include Schema(A,B,C) inside SchemaMain. When I
generate an instance of SchemaMain I only get SchemaA as the output.

I use XSD Include instead of XSD im****t because targetnamespaces for
all the schemas is empty but their type names are different. I need
the output XML to be as clutter free as possible (meaning only data
and no namespaces).

Any Idea on why I dont get the complete output when I try Generate
Instance.

All Help is Great Help

Thanks
Sree