#macro ( recursive $e $indent )     
#if( $e.getChildren().size() > 0 )
$indent <$e.getName()> 
#foreach ($child in $e.getChildren() ) 
#recursive( $child "$indent  " )
#end
$indent </$e.getName()>
#else
$indent <$e.getName()>
$indent    $e.getTextTrim()
$indent </$e.getName()>
#end
#end

#set($i = " ")

First, we print out the document tree with a 
recursive Velocimacro :

#recursive( $root.getRootElement() $i )


Next, we access pieces of data directly :

email : $root.getRootElement().getChild("properties").getChild("author").getChild("email").getText()
last name :  $root.getRootElement().getChild("properties").getChild("author").getChild("name").getChild("last").getChild("full").getText()