<csstest def="NEGATED attribute existence selector" module="W3C Selectors" modulename="css3-modsel" number="50" rev="1.0" date="11-july-2001" xmlns:a="http://www.example.org/a" xmlns:b="http://www.example.org/b" xmlns:html="http://www.w3.org/1999/xhtml" xmlns="http://www.example.org/css3tests">

<author>Daniel Glazman</author>

<cssrules>@namespace a url(http://www.example.org/a);
a|* { color : red ; display : block ; margin-bottom : 1em }
div.stub *|*:not([test]) { color : lime }</cssrules>

<code>
<div class="stub" xmlns="http://www.w3.org/1999/xhtml">
<q test="1" xmlns="http://www.example.org/a">
  <r>This text should be in green characters</r>
</q>
<s xmlns="http://www.example.org/a">This text should be in green characters</s>
</div>
</code>
</csstest>