dmacvicar

<channel>
  <subchannel>
    <package>
        <name>A</name>
        <history>
            <update>
                <hid>1234</hid>
                <version>1.5</version>
                <release>1</release>
            </update>
        </history>
    </package>
    <package>
        <name>A</name>
        <history>
            <update>
                <hid>12345</hid>
                <version>2.0</version>
                <release>1</release>
            </update>
        </history>
        <requires>
            <dep name='B'/>
        </requires>
    </package>

  </subchannel>
</channel>