[xsl] Flattening hierarchic xml, retaining some structure

["Ragulf Pickaxe" <jawxml@xxxxxxxxxxx>]

Hi, I have a hierarchic structure, that I would like to flatten.
I have tried looking for some examples, but I have not been able to expand 
the examples I have found, so that they will work on my problem.
(I have no influence on either input or output format, which is simplified 
here)

Regards,
Ragulf Pickaxe :-)

Expanding on the example from David Pawson's site:
http://www.dpawson.co.uk/xsl/sect2/flatten.html
I have the following XML and would like to generate the flat structure as 
shown:

Input XML:
<mynode name="xxx">
 <subnode>Some text</subnode>
 <subnode>
   <mynode name="yyy">
     <subnode><b>Some bold text</b></subnode>
     <subnode>Some text where some of it is <b>bold text</b></subnode>
     <subnode>
       <mynode name="zzz">
         <subnode>Some text</subnode>
         <subnode>Some text</subnode>
       </mynode>
     </subnode>
     <subnode>Yet some text</subnode>
   </mynode>
 </subnode>
 <subnode>Some more text, <i>italic</i> is some of it</subnode>
</mynode>

Output XML:
<mynode name="xxx">
 <subnode>Some text</subnode>
<mynode name="yyy">
 <subnode><b>Some bold text</b></subnode>
 <subnode>Some text where some of it is <b>bold text</b></subnode>
</mynode>
<mynode name="zzz">
 <subnode>Some text</subnode>
 <subnode>Some text</subnode>
</mynode>
<mynode name="yyy">
 <subnode>Yet some text</subnode>
</mynode>
<mynode name="xxx">
 <subnode>Some more text, <i>italic</i> is some of it</subnode>
</mynode>

I have tried some various forms of modes, and such, but alas no success, and 
no idea how to obtain success. The problem is with retaining the subnode 
under mynode structure, while also having the subnodes in the same document 
order as in the input.

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