[xsl] node concatenation

["bix xslt" <bix_xslt@xxxxxxxxxxx>]

All,

I believe this may have been covered before with some of the grouping q/a's 
but I did a few searches both on the fact and the archive, and I was unable 
to find what I was looking for.

Essentially, I've got something similar to the following:
~~~~xml fragment~~~~
<element name="a">
 <attribute name="attA1"/>
 <attribute name="attA2"/>
 <element name="aa">
   <attribute name="attAA1"/>
   <attribute name="attAA2"/>
 </element>
</element>
<element name="b" />
<element name="a">
 <attribute name="attA3"/>
 <attribute name="attA4"/>
 <element name="ab">
   <attribute name="attAB1"/>
   <attribute name="attAB2"/>
   <element name="aba">
     <attribute name="attABA1"/>
     <attribute name="attABA2"/>
     <attribute name="attABA3"/>
     <attribute name="attABA4"/>
   </element>
 </element>
</element>
<element name="a"/>
<element name="b">
 <element name="ba"/>
</element>

I would like to combine all of the similar elements and reference the 
element children into something like this:
~~~ xml fragment output ~~~
<element name="a">
 <attribute name="attA1"/>
 <attribute name="attA2"/>
 <attribute name="attA3"/>
 <attribute name="attA4"/>
 <elementRef name="aa"/>
 <elementRef name="ab"/>
</element>
<element name="b">
 <elementRef name="ba"/>
</element>
<element name="aa">
 <attribute name="attAA1"/>
 <attribute name="attAA2"/>
</element>
<element name="ab">
 <attribute name="attAB1"/>
 <attribute name="attAB2"/>
 <elementRef name="aba">
</element>
....etc

I am attempting to come up with an automated way of storing off what the DTD 
is of the xml data produced by my database.  My hope is that I can transform 
my original xml into this newer format (element/attribute), and then 
transform that into a DTD file.  I have an xsl file that works through all 
of the original xml data and produces what you see above.  However, I'm at a 
loss how to group/concatenate the multiple data outputs.  If there is a 
better way to do this, I'd sure appreciate the help.

Thanks!
bix





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