RE: [xsl] Count of unique elements [XSLT 1.0]

Counting unique elements is a simple example of the grouping problem. Read
about grouping in XSLT 1.0 at http://www.jenitennison.com/xslt/grouping

Michael Kay
http://www.saxonica.com/

-----Original Message-----
From: Kirov Plamen [mailto:pkirov(_at_)globul(_dot_)bg] 
Sent: 24 November 2006 09:05
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Count of unique elements [XSLT 1.0]

Hi all,

The XML:

      <product>
              <prodid>V667320</prodid>
              <name>Battery Pack</name>
              <price>$20</price>
              <quantity>178</quantity>
              <region>SouthWest</region>
      </product>
      <product>
              <prodid>M382932</prodid>
              <name>CD Visor Organizer</name>
              <price>$19</price>
              <quantity>129</quantity>
              <region>NorthWest</region>
      </product>
      <product>
              <prodid>U3923839</prodid>
              <name>Rock n Roll Supercart</name>
              <price>$150</price>
              <quantity>200</quantity>
              <region>SouthWest</region>
      </product>
      <product>
              <prodid>Q3929302</prodid>
              <name>Digital Tire Guage</name>
              <price>$40</price>
              <quantity>623</quantity>
              <region>NorthWest</region>
      </product>

I want to count the unique elements 'region' into XML. In 
this example the count result must be "2" - there's two 
unique 'region': NorthWest and SouthWest.

Any help is appreciated.

BR
Plamen

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