chromium/third_party/blink/web_tests/svg/custom/resources/getsvgdocument.svg

<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
  <rect id="rect" x="0" y="0" width="100%" height="100%" fill="red"/>
  <text id="text" x="5" y="16">FAILURE</text>
</svg>