<my MetaData>
  <OCD name="Apache Felix Http Config" id="org.osgi.service.http">
    <AD id="org.osgi.service.http.port" type="STRING" cardinality="0" />
  </OCD>
  <Designate pid="org.apache.felix.http" bundle="*">
    <Object ocdref="org.osgi.service.http">
      <Attribute adref="org.osgi.service.http.port">
        <Value>8080</Value>
      </Attribute>
    </Object>
  </Designate>
</my MetaData>