Martin Honnen a pensé très fort :

> That data above is not what you posted initially.

Sure. It was just an example but it is the same way.

> Your stylesheet has the right approach with the key but I think it can be 
> much shorter, at least for the data you posted originally:
>
> <xsl:stylesheet
>    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>    version="1.0">
>
>    <xsl:output method="xml" indent="yes"/>
>
>    <xsl:key name="by-tag"
>             match="tag"
>             use="."/>
>
>    <xsl:template match="/items">
>      <tags>
>        <xsl:apply-templates select="item/tags/tag[generate-id() = 
> generate-id(key('by-tag', .)[1])]">
>          <xsl:sort select="count(key('by-tag', .))" data-type="number" 
> order="descending"/>
>        </xsl:apply-templates>
>      </tags>
>    </xsl:template>
>
>    <xsl:template match="tag">
>      <tag id="{.}">
>        <xsl:value-of select="count(key('by-tag', .))"/>
>      </tag>
>    </xsl:template>
>
> </xsl:stylesheet>

I'll try this sample, thanks.
Now, I've decided to provide data using Xml Web Services but the page 
render will use Javascript + Xsl transformation.

--
Delf