chromium/third_party/blink/web_tests/css3/selectors3/xml/css3-modsel-120.css

@namespace html url(http://www.w3.org/1999/xhtml);
@namespace a url(http://www.example.org/a);
@namespace b url(http://www.example.org/b);
div.stub > * { display : block ; margin-bottom : 1em ;
                            background-color : red }
div.stub > *:not(|p) { background-color : lime }
div.stub > *|l > *:not(|p) { background-color : red }