[xsl] copying child nodes n-level deep

[Ram Anantha <ranantha@xxxxxxxxxxxxx>]

Given:
<A>
  <B>
    <C id="1">
      <D id1="2">
        <E>hello</E>
      </D>
    </C>
  </B>
</A>

I would like to copy all the elements and their children starting from D.
The logic is, take the grand-child of B (in this case D) and copy it (along
with all its children). The only known element name is B..How can I write a
generic xsl code such that from the following schema:

<AA>
  <B>
    <CC id="1">
      <DD id1="2">
        <EE>hello</EE>
        <FF>hello2</FF>
      </DD>
    </CC>
  </B>
</AA> 

I can copy (B's grand child (DD)  and its children):
     <DD id1="2">
        <EE>hello</EE>
        <FF>hello2</FF>
      </DD>

Thanks a lot for the help.


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