The code below is a quick example on how to handle nested children in a simple XML feed and how to handle namespace fields that have a ":" in them.
Here is a link to xpath sytnax for those not familiar: http://www.w3schools.com/xpath/xpath_syntax.asp
Here is a link to the XMLtool documentation in dotCMS: http://dotcms.com/docs/latest/XMLTool
#set($myXML = $xmltool.read("http://fruitfromthevine.wordpress.com/feed/"))
<h2>Fruit From the Vine XML Feed</h2>
<table border="1" style="width:100%;">
<tr>
<th><h2>Title</h2></th>
<th><h2>Link</h2></th>
<th><h2>Description</h2></th>
<th><h2>Update Period</h2></th>
<th><h2>Update Frequency</h2></th>
</tr>
<tr>
<td>
$myXML.find("/rss/channel/title").text</td>
<td>
$myXML.find("/rss/channel/link").text</td>
<td>
$myXML.find("/rss/channel/description").text</td>
<td>
$myXML.find("/rss/channel/sy:updatePeriod").text</td>
<td>
$myXML.find("/rss/channel/sy:updateFrequency").text</td>
</tr>
</table>
<h2>Articles</h2>
#set($itemlist= $myXML.find("/rss/channel/item"))
#foreach($items in $itemlist.iterator())
#set($item = $xmltool.parse($items))
##Use the escape html tool to see all the fields, debug, etc. as needed
##$esc.html($item)
<table border="1" style="width:100%;">
<tr>
<th><h3>Title</h3></th>
<th><h3>Link</h3></th>
</tr>
<a href="/test/test-maps.html"> </a>
<tr>
<td style="width:30%;">$item.find("/item/title").text</td>
<td><a href="${item.find("/item/link").text}" target="blank">$item.find("/item/link").text</a></td>
</tr>
</table>
#end