Depth of sourde tree

Hi all,
I have an XML-Document that reflects the structure of a menu, for
example

<menu>
    <entry>
        <name>one</name>
        <entry>
            <name>oneone</name>            <-----
        </entry>
        <entry>
            <name>onetwo</name>            <-----
        </entry>
    </entry>
    <entry>
        <name>two</name>
    </entry>
</menu>

and so forth.
So, what I am trying to get is the depth of this structure, i.e. the
maximum indent or the number of children of the longest path between an
<entry> element and its innermost child ('oneone' or 'onetwo' in this
case). Does anyone know how to achieve this.
Thanks for any help! Martin Kupisch


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