I'm just learning XSLT and am currently stuck trying to solve the
following problem.

My XML looks like this: 

<resultset>
- <record>
  	<field name="vchAdmin">XXX</field> 
  	<field name="vchRoot">1</field> 
  </record>
- <record>
  	<field name="vchAdmin">YYY</field> 
  	<field name="vchRoot">1</field>  
  </record>
- <record>
  	<field name="vchAdmin">YYY</field> 
  	<field name="vchRoot">2</field> 
  </record>
- <record>
  	<field name="vchAdmin">YYY</field>
  	<field name="vchRoot">2</field>  
  </record>
- <record>
  	<field name="vchAdmin">ZZZ</field> 
  	<field name="vchRoot">1</field> 
  </record>
- <record>
  	<field name="vchAdmin">ZZZ</field>
  	<field name="vchRoot">1</field>  
  </record>
<resultset>

What I need to achieve is to count # of DISTINCT vchRoot's PER
vchAdmin and place that into a different XML format.

In this case, my output has to be:

<resultset>
  <record> 
  	<vchAdmin>XXX</vchAdmin>
  	<iDistinctRoots>1</iDistinctRoots>
  </record>
  <record> 
  	<vchAdmin>YYY</vchAdmin>
  	<iDistinctRoots>2</iDistinctRoots>
  </record>
  <record> 
  	<vchAdmin>ZZZ</vchAdmin>
  	<iDistinctRoots>1</iDistinctRoots>
  </record>
</resultset>

I've tried using nested keys to first get distinct vchAdmin's and then
get and count distinct vchRoots for each vchAdmin but nothing seems to
work.

Please help?
Thank you in advance!!

XSLT Newby