css3-modsel-152.xml
<csstest def=":empty pseudo-class and elements" module="W3C Selectors" modulename="css3-modsel" number="152" rev="1.0" date="15-november-2001" xmlns="http://www.example.org/css3tests">
<author>Ian Hickson</author>
<cssrules>
address { background: lime; margin: 0; height: 1em; }
address:empty { background: red; }
.text { margin: -1em 0 0 0; }
</cssrules>
<code>
<address xmlns="http://www.w3.org/1999/xhtml"><span/></address>
<div class="text" xmlns="http://www.w3.org/1999/xhtml">This line should have a green background.</div>
</code>
</csstest>