Hi Martin.
Thanks for your answer, but it doesn't work for me.
I have resent a message with my real data.
Maybe your solution would work if I don't change it to fit my data :)
Thanks, anyway.
Regards,
Fabien



-----Message d'origine-----
De : Martin Honnen [mailto:Martin.Honnen@xxxxxx]
Envoyi : mercredi 16 juin 2010 15:23
@ : xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Objet : Re:  XSL Processing to avoid repetitions

Fabien Tillier wrote:
> Hi List.
> I was wondering if anyone could help me to filter out data in an XML
stream.
> (can be xslt 2.0...)
>
> For example, I have
> <xml>
>       <city>
>             <name>Paris</name>
>             <person>Paul</person>
>       </city>
>       <city>
>             <name>New-York</name>
>             <person>John</person>
>       </city>
>       <city>
>             <name>Paris</name>
>             <person>George</person>
>       </city>
> </xml>
>
> I would like to have an XSL template able to output something like (using
<OL> for example) Paris
>       Paul
>       George
> New-York
>       John
>
> Actually, all I am able to do is to get
> Paris
>       Paul
> New-York
>       John
> Paris
>       George

With XSLT 2.0 you can use xsl:for-each-group to group the data
<ol>
   <xsl:for-each-group select="/xml/city" group-by="name">
     <li>
       <xsl:value-of select="current-grouping-key()"/>
       <ol>
         <xsl:for-each select="current-group()/person">
           <li><xsl:value-of select="."/></li>
         </xsl:for-each>
       </ol>
     </li>
   </xsl:for-each-group>
</ol>


> (please note that the real structure is more complicated, and the filter is
to be done on more than one level...)

You will need to provide more details then.

--

	Martin Honnen
	http://msmvps.com/blogs/martin_honnen/