Unique key references is not working. For the following definitions in schema

 <xs:keyref name="default-virtual-server-nameKeyref" refer="virtual-server-nameKey">
    <xs:annotation>
      <xs:documentation>
        &lt;default-virtual-server-name> must refer to an existing
&lt;virtual-server>.
      </xs:documentation>
    </xs:annotation>
    <xs:selector xpath="http-listener"/>
    <xs:field xpath="default-virtual-server-name"/>
  </xs:keyref>

<xs:keyref name="http-listener-nameKeyref" refer="http-listener-nameKey">
    <xs:annotation>
      <xs:documentation>
        &lt;http-listener-name> must refer to an existing &lt;http-listener>.
      </xs:documentation>
    </xs:annotation>
    <xs:selector xpath="virtual-server"/>
    <xs:field xpath="http-listener-name"/>
  </xs:keyref>
</xs:element>

Sample elements as follows:

<http-listener>
  <name>http-listener-1</name>
  <port>2222</port>
  <server-name>syrinx</server-name>
  <default-virtual-server-name>sample</default-virtual-server-name>
</http-listener>

<virtual-server>
  <name>sample</name>
  <host>syrinx</host>
  <http-listener-name>http-listener-1</http-listener-name>
</virtual-server>

For example changing default-virtual-server-name value to say "foo" (which does
not exist) via the generated bean works without any error. So, basically no code
is being generated for validating keyrefs.