<eww>
  <definitions>
    <def name="something">
      <box class="{{some_var}}" halign="start">
        <button onclick="notify-send 'test' 'message'">
          {{some_script}}
        </button>
      </box>
    </def>
  </definitions>
  <variables>
    <var name="some_var">
      foo
    </var>
    <script-var name="some_script" interval="1s">
      date | sed 's/:/X/g' | rev
    </script-var>
  </variables>
  <windows>
    <window name="foo">
      <geometry anchor="center" width="100px" height="10%"/>
      <widget>
        <something arg="value"/>
      </widget>
    </window>
  </windows>
</eww>
