Nicopil@mi wrote:
> Hi everybody, i would like to sort alphabetically  the "rep" items by 
> their id parameter.
> Could you help me to make the xsl file please ?
> 
> <repertoires>
>   <rep id=nomdurep1>
>     <param .... />
>     <param .... />
>   </rep>
>   <rep id=nomdurep2>
>     <param .... />
>     <param .... />
>   </rep>
>   <rep id=nomdurep3>
>        <rep id=nomdusousrep1>
>          <param .... />
>          <param .... />
>       </rep>
>        <rep id=nomdusousrep2>
>          <param .... />
>          <param .... />
>       </rep>
>      <param .... />
>      <param .... />
>   </rep>
> </repertoires>

Consider to post well-formed snippets of XML, otherwise we can't test 
our solutions against your sample data.
So here is some untested suggestion:

   <xsl:template match="reportoires">
     <xsl:copy>
       <xsl:apply-templates select="rep">
         <xsl:sort select="@id"/>
       </xsl:apply-templates/>
     </xsl:copy>
   </xsl:template>

   <xsl:template match="rep">
     <xsl:copy>
       <xsl:copy-of select="@*"/>
       <xsl:apply-templates select="rep">
         <xsl:sort select="@id"/>
       </xsl:apply-templates/>
       <xsl:copy-of select="param"/>
     </xsl:copy>
   </xsl:template>

That solution assumes you want to sort the 'rep' children of the 
'repertoires' element by their 'id' attribute value and then assumes 
that you want sort the 'rep' children of each 'rep' element again by 
their 'id' attribute value.

You haven't really explained what you want to to with the nested 'rep' 
elements so the above is just an assumption of what you might want.

-- 

	Martin Honnen --- MVP XML
	http://msmvps.com/blogs/martin_honnen/