Normalized Schema

Hello!

I have to normalize a schema with xslt for an application.
With "normalizing" I mean to flatten the schema-structure, e.g. to dissolve all references and insert it at the referenced place... 
I am searching for a specification how to normalize a schema, but I have not found anything up to now. Maybe someone knows where to find the spec or maybe someone has/had the same thing to do?

Thank you and greeets

Thilo