I'm using XML::RSS to retrieve items from an RSS feed that contains elements that look like this:

<item>
  <title>Mountain West Conference Review, Week 3</title> 
  <description>Well, the MWC continues to look more and more like a 
    one team wonder, as Utah continues to be impressive...
  </description> 
  <guid isPermaLink="true">
    http://www.fanblogs.com/mountainwest/archives/001549.php
  </guid> 
  <pubDate>Tue, 21 Sep 2004 12:26:17</pubDate> 
</item>
[download]

How can I retrieve the isPermaLink attribute? I'm able to access the guid value like so:

$item->{'guid'}

but I want to do so only if the isPermaLink attribute is true.

Janitored by Arunbear - replaced pre tags with code tags