Daniel Glazman Ian Hickson @namespace a url(http://www.example.org/a); @namespace b url(http://www.example.org/b); *|p, *|q, *|r { display : block ; margin-bottom : 1em } *|p, *|r { background-color : red } div.stub *:not([a|title]) {background-color : lime }


 
  This a:q element should be unstyled.
  This paragraph should have a green background.
  This b:r element should have a green background.