<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="urn:1"
            xmlns:tns="urn:1" elementFormDefault="qualified"
            attributeFormDefault="unqualified">
    <xsd:include schemaLocation="B.xsd"/>
    <xsd:complexType name="A">
        <xsd:complexContent>
            <xsd:extension base="tns:B"/>
        </xsd:complexContent>
    </xsd:complexType>
</xsd:schema>