selective non duplicates

I am trying to select the non duplicate entries out of my xml document, but
it doesn't seem to be working.  I do not want the distinct productId's out
of the whole document, only the distinct productId in the current
"clients/client/commissions/commission/product"  The statement I have below
seems to give me all of them, no matter if they are a duplicate or not....
(statement [1] gives me the same results as statement [2])  This leads me to
believe that not(productId = preceding-sibling::product/productId is always
true...

[1]
sum(clients/client[commissions/commission/earnerId =
$curEarner]/products/product[id=../../commissions/commission[earnerId=$curEa
rner]/product/productId and not(productId =
preceding-sibling::product/productId]/count)

[2]
sum(clients/client[commissions/commission/earnerId =
$curEarner]/products/product[id=../../commissions/commission[earnerId=$curEa
rner]/product/productId]/count)

<earners>
   <earner>
      <id />
      <name />
   </earner>
</earners>
<clients>
   <client>
   <id>
   <name>
   <commissions>
      <commission>
         <id />
         <earnerId />
         <product>
           <productId />
           <rate />
         </prodcut>
      </commission>
    </commissions>
    <products>
       <product>
          <id />
          <name />
       </product>
    </products>
    </client>
</clients>

----- Original Message ----- 
From: "marco pedrini" <marco.pedrini@xxxxxxxxxx>
To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Monday, July 07, 2003 08:47
Subject: Re:  number total of page


hallo Robert21,
    time ago I asked the list for the same question, this was the answer, it
works fine!

Always look inside the FAQ, is your friend.
http://www.dpawson.co.uk/xsl/sect3/N8703.html

Hope it helps.

Ciao
Marco



-----Messaggio Originale----- 
Da: <a.robert21@xxxxxxxxxxxxxx>
A: "XSL-List" <XSL-List@xxxxxxxxxxxxxxxxxxxxxx>
Data invio: lunedì 7 luglio 2003 14.19
Oggetto:  number total of page




Hi I'm generating a (PDF file) XSL-FO code from some XSLT
script,

I'm trying to get the number total of page , but I don't
achieve to get it, could you help me to find how to get it?


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