<filter name="openid_login" module="member" act="procMemberOpenIDLogin">
    <form>
        <node target="openid" required="true" />
        <node target="referer_url" required="true" />
    </form>
    <parameter />
    <response callback_func="completeOpenIDLogin">
        <tag name="error" />
        <tag name="message" />
    </response>
</filter>
