css/css-namespaces/syntax-005.xml

<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <link rel="author" title="Anne van Kesteren" href="http://annevankesteren.nl/"/>
  <link rel="author" title="Opera Software ASA" href="http://opera.com/"/>
  <link rel="help" href="http://www.w3.org/TR/css-namespaces-3/#syntax"/>
  <link rel="match" href="reference/ref-lime-5.xml"/>
  <title>CSS Namespaces Test Suite: @namespace string and url() syntax</title>
  <style>
   test { background:red }
  </style>
  <style>
   @namespace a url(test-a);
   @namespace b url('test-b');
   @namespace c url("test-c");
   @namespace d 'test-d';
   @namespace e "test-e";
   a|test, b|test, c|test, d|test, e|test { background:lime }
  </style>
 </head>
 <body>
  <p><test xmlns="test-a">This sentence should have a green background.</test></p>
  <p><test xmlns="test-b">This sentence should have a green background.</test></p>
  <p><test xmlns="test-c">This sentence should have a green background.</test></p>
  <p><test xmlns="test-d">This sentence should have a green background.</test></p>
  <p><test xmlns="test-e">This sentence should have a green background.</test></p>
 </body>
</html>