<schema targetNamespace="urn:xmlschema:recursive:b"
        xmlns="http://www.w3.org/2001/XMLSchema"
        xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
        elementFormDefault="qualified" >
        
    <import namespace="urn:xmlschema:recursive:a" schemaLocation="a.xsd"></import>
    
</schema>