chromium/third_party/blink/web_tests/css3/selectors3/xml/css3-modsel-5.xml

<?xml-stylesheet href="css3-modsel-5.css" type="text/css"?>
<test>
<p xmlns="http://www.w3.org/1999/xhtml" title="title">This paragraph should have a green background because its TITLE
      attribute is set.</p>
</test>