Zend GData, Google Calendar API Question

I read the tutorial from IBM develop开发者_如何学Goment website. http://www.ibm.com/developerworks/xml/library/x-googleclndr/#resources

I tested successfully. Now I don't know how to insert the event Description at my event view page. Based on the code below. Only showed event id, event title. Is there a parameter like event->description ? thanks.

The code below from the sample code file view.php

foreach ($feed as $event) {
  echo "<li>\n";
  echo "<h2>" . stripslashes($event->title) . "</h2>\n";
  echo stripslashes($event->summary) . " <br/>\n";
  $id = substr($event->id, strrpos($event->id, '/')+1);
  echo "<a href=\"edit.php?id=$id\">edit</a> | ";
  echo "<a href=\"delete.php?id=$id\">delete</a> <br/>\n";
  echo "</li>\n";
}

I think that what you are looking for is $event->content. Have a look at the Manual for Zend_GData catelendar API.