treating a CDATA node as Elements nodes

CDATA sections are viewed as a single node that can't
be split up even more in template rules right?

i was wondering if u can take a CDATA node which could
be filled with XHTML and then select nodes in that?

for example in rss, to choose the img node in a CDATA
section.

<content:encoded>
<![CDATA[ 
<p class="warning">An Excessive Heat Watch Remains In
Effect For Friday
</p>
<h4>
<a
href="http://www.rssweather.com/hw3.php?place=philadelphia"><img
src="pcloudy.gif"/>
</a>
</h4>
<h4>
Cloudy
</h4>
  ]]> 
  </content:encoded>

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