<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
  <g id="foo">
    <rect x="10" y="10" width="200" height="80" fill="#ccc"/>
    <image x="20" y="20" width="180" height="60" xlink:href="resources/rgb.svg"/>
  </g>
  <use x="0" y="90" xlink:href="#foo"/>
</svg>