<!doctype html>
<title>CSS Test reference</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<svg width="200" height="100">
  <defs>
    <g id="p0">
      <rect width="100" height="100" style="fill: blue" />
      <rect x="100" y="0" width="100" height="100" style="fill: purple" />
    </g>
  </defs>
  <use href="#p0" x="0" y="0" />
</svg>