How to generate 1 logical XML schema

[MaximK]

Hello,
   I'm generating an XML Schema from the C# project with the use of EnterpriseArchitect 9.3 ("Code engineering" => "Generate XML Schema..", the checkbox "Generate XSD for referenced packages" is on). Classes are separated among several namespaces. The schema is successfully generated, however, every namespace produces an appropriate XSD file and all of them are unrelated (no <xs:include> reference in the main schema file).
   How to produce a (logically) one XML schema?

Thanks a lot,
   Maxim.

[MaximK]

So, guys, any ideas??