<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
    targetNamespace="a:b:c"
    xmlns:ns="a:b:c">
    <xs:element name="person" type="ns:Person"/>
    <xs:complexType name="Person">
        <xs:sequence>
            <xs:element name="name" type="xs:string"/>
            <xs:element name="height" type="xs:double"/>
        </xs:sequence>
    </xs:complexType>
    <xs:complexType name="Employee">
        <xs:complexContent>
            <xs:extension base="ns:Person">
                <xs:sequence>
                    <xs:element name="jobDescription" type="xs:string"/>
                </xs:sequence>
            </xs:extension>
        </xs:complexContent>
    </xs:complexType>
</xs:schema>