wpf - Binding TreeView to XML DataSource

Question

I'm struggling with the WPF TreeView and an XmlDataProvider. The format of my XML datasource is like this:

<OrcChart>
    <Unit Id="1" ParentId="0" Name="Unit1" />
    <Unit Id="2" ParentId="1" Name="Unit2" />
    <Unit Id="3" ParentId="1" Name="Unit3" />
    <Unit Id="4" ParentId="2" Name="Unit4" />
    <Unit Id="5" ParentId="4" Name="Unit5" />
</OrcChart>

Is it possible to display this recursive structure in a TreeView by using pure XAML? Help is greatly appreciated!

JKO