<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/licenses/publicdomain/
-->
<html xmlns="http://www.w3.org/1999/xhtml"
     xmlns:svg="http://www.w3.org/2000/svg"
     xmlns:xlink="http://www.w3.org/1999/xlink">
<body style="margin:0">
  <div style="mask: url(extref-test-1-resource.xhtml#m1); width:500px; height:500px; background:lime;"></div>
</body>
</html>