chromium/third_party/blink/web_tests/css3/selectors3/xml/css3-modsel-17.xml

<?xml-stylesheet href="css3-modsel-17.css" type="text/css"?>
<test>
<p xmlns="http://www.w3.org/1999/xhtml" class="test">
<a href="">You should see a green background assigned by the anchor.</a>
</p>
</test>