chromium/src/third_party/blink/web_tests/css3/selectors3/xml/css3-modsel-94b.css

@namespace a url(http://www.example.org/a);
@namespace b url(http://www.example.org/b);
p, q { display : block ; margin-bottom : 1em }
b|* { background-color : red }
[test] { background-color: lime; }