<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>CSS: 1 simple test of namespaces (attributes)</title>
<style type="text/css">
@namespace html url(http://www.w3.org/1999/xhtml);
@namespace test url(http://www.example.org/);
html|body { color: red; }
[test] { color: green; }
</style>
</head>
<body>
<test test="test" xmlns="http://www.example.org/">
This should be green.
</test>
</body>
</html>