<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title>Attribute existence selector with declared namespace</title>
  <style type="text/css"><![CDATA[@namespace a url(http://www.example.org/a);
@namespace b url(http://www.example.org/b);
*|p, *|q, *|r { display : block ; margin-bottom : 1em }
*|q { background-color : lime ! important }
*[a|title] {background-color : red }
]]></style>
  <link rel="author" title="Daniel Glazman" href="http://glazman.org/"/>
  <link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch"/>
  <link rel="help" href="https://www.w3.org/TR/css3-selectors/#selectors"/> <!-- bogus link to make sure it gets found -->
  <meta name="flags" content=" namespace" />
 </head>
 <body xmlns:a="http://www.example.org/a" xmlns:b="http://www.example.org/b">
 <p title="a paragraph">This paragraph should be unstyled.</p>
 <q xmlns="http://www.example.org/a" a:title="a paragraph">This paragraph should have a green background.</q>
 <r xmlns="http://www.example.org/b" b:title="a paragraph">This paragraph should be unstyled.</r>
</body>
</html>