Why I want to change the value of a variable.

David Carlisle wrote:
> 
> > Is it possible in xsl to change the value of a variable?
> 
> No.

So why is it called 'variable'?
 
> If you said what you _really_ wanted to do (ie what effect you wanted to
> achieve) then no doubt someone could help.

OK.

I have a list of people in a XML format:

<LIST_PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Emmanuel</FIRST_NAME>
	      <NAME>Leguy</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Sam</FIRST_NAME>
	      <NAME>Kememer</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Gilles</FIRST_NAME>
	      <NAME>Presley</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Marie-Pierre</FIRST_NAME>
	      <NAME>Smith</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Eve</FIRST_NAME>
	      <NAME>Ramone</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Florence</FIRST_NAME>
	      <NAME>Lerouge</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Marc</FIRST_NAME>
	      <NAME>Duchmol</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Yves</FIRST_NAME>
	      <NAME>Durant</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Maria</FIRST_NAME>
	      <NAME>Dupuis</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Laurent</FIRST_NAME>
	      <NAME>Leclercq</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Chris</FIRST_NAME>
	      <NAME>Dupont</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Alan</FIRST_NAME>
	      <NAME>Stivell</NAME>
	</PEOPLE>
	<PEOPLE>
	      <FIRST_NAME>Gweltaz</FIRST_NAME>
	      <NAME>Ar Fur</NAME>
	</PEOPLE>
</LIST_PEOPLE>

and I would like to transform it in html:

<HTML>
<HEAD><TITLE>People list</TITLE></HEAD>
<BODY>
<CENTER>- A -</CENTER><BR>
Gweltaz Ar Fur<BR>
<CENTER>- B -</CENTER><BR>nobody<BR>
<CENTER>- C -</CENTER><BR>nobody<BR>
<CENTER>- D -</CENTER><BR>
Marc Duchmol<BR>
Chris Dupont<BR>
Maria Dupuis<BR>
Yves Durant<BR>
<CENTER>- E -</CENTER><BR>nobody<BR>
<CENTER>- F -</CENTER><BR>nobody<BR>
<CENTER>- G -</CENTER><BR>nobody<BR>
<CENTER>- H -</CENTER><BR>nobody<BR>
<CENTER>- I -</CENTER><BR>nobody<BR>
<CENTER>- J -</CENTER><BR>nobody<BR>
<CENTER>- K -</CENTER><BR>
Sam Kememer<BR>
<CENTER>- L -</CENTER><BR>
Laurent Leclercq<BR>
Emmanuel Leguy<BR>
Florence Lerouge<BR>
<CENTER>- M -</CENTER><BR>nobody<BR>
<CENTER>- N -</CENTER><BR>nobody<BR>
<CENTER>- O -</CENTER><BR>nobody<BR>
<CENTER>- P -</CENTER><BR>
Gilles Presley<BR>
<CENTER>- Q -</CENTER><BR>nobody<BR>
<CENTER>- R -</CENTER><BR>
Eve Ramone<BR>
<CENTER>- S -</CENTER><BR>
Marie-Pierre Smith<BR>
Alan Stivell<BR>
<CENTER>- T -</CENTER><BR>nobody<BR>
<CENTER>- U -</CENTER><BR>nobody<BR>
<CENTER>- V -</CENTER><BR>nobody<BR>
<CENTER>- W -</CENTER><BR>nobody<BR>
<CENTER>- X -</CENTER><BR>nobody<BR>
<CENTER>- Y -</CENTER><BR>nobody<BR>
<CENTER>- Z -</CENTER><BR>nobody<BR>
</BODY>
</HTML>

To do this i use this algorithm:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/TR/WD-xsl";
indent-result="yes">

<xsl:template match="/">
  <HTML>
    <HEAD><TITLE>People list</TITLE></HEAD>
    <BODY>
      <!-- declaration of curentChar -->
      <xsl:for-each select="LIST_PEOPLE/PEOPLE">
        <xsl:sort select="NAME"/>
        <xsl:sort select="FIRST_NAME"/>
	<xsl:variable name="firsChar">
	    <xsl:value-of select="substring(NAME,1,1)"/>
	</xsl:variable>
	<xsl:if test="not(string(curentChar)=string(firstChar))">
	     <CENTER>- <xsl:value-of select="$firstChar"/> -</CENTER><BR/>
	     <!-- put the firstChar value into curentChar -->
	</xsl:if>
	<xsl:value-of select="FIRST_NAME"/>
	<xsl:text>&nbsp;</xsl:text>
	<xsl:value-of select="NAME"/>
	<BR/>
      </xsl:for-each>
    </BODY>
  </HTML>
</xsl:template>

</xsl:stylesheet> 

Manu.
--
Laboratoire d'Informatique Fondamentale de Lille (LIFL)
Universite des Sciences et Technologies de Lille
Batiment M3 Cite Scientifique
59655 Villeneuve d'Ascq Cedex
FRANCE
tel: 03 20 33 63 38
fax: 03 20 43 65 66
mailto:Emmanuel.Leguy@xxxxxxx
http://www.lifl.fr


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