<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:my_ns="http://my/ns" 
           targetNamespace="http://main/ns"
           elementFormDefault="qualified" attributeFormDefault="unqualified">
 <xs:import namespace="http://my/ns" schemaLocation="gmlas_interesting_schema.xsd" />
</xs:schema>
