enlightenment/src/protocol/efl-aux-hints.xml

<protocol name="efl_aux_hints">

  <interface name="efl_aux_hints" version="2">
    <request name="add_aux_hint">
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="id" type="int"/>
      <arg name="hint" type="string"/>
      <arg name="val" type="string"/>
    </request>
    <request name="change_aux_hint">
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="id" type="int"/>
      <arg name="val" type="string"/>
    </request>
    <request name="del_aux_hint">
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="id" type="int"/>
    </request>
    <request name="get_supported_aux_hints">
      <arg name="surface" type="object" interface="wl_surface"/>
    </request>
    <event name="supported_aux_hints">
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="hints" type="array"/>
      <arg name="num_hints" type="uint"/>
    </event>
    <event name="allowed_aux_hint">
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="id" type="int"/>
    </event>
    <event name="aux_message">
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="key" type="string"/>
      <arg name="val" type="string"/>
      <arg name="options" type="array"/>
    </event>
    <request name="add_aux_hint_fd">
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="id" type="int"/>
      <arg name="hint" type="string"/>
      <arg name="val" type="fd"/>
    </request>
    <request name="change_aux_hint_fd">
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="id" type="int"/>
      <arg name="val" type="fd"/>
    </request>
  </interface>

</protocol>