chromium/third_party/blink/web_tests/css3/selectors3/xml/css3-modsel-51.css

@namespace a url(http://www.example.org/a);
div.stub > p {color : red }
div.stub > a|* { color : red ; display : block ; margin-bottom : 1em }
div.stub *|*:not([test="1"]) { color : lime }