RE: [xsl] Sorting in descending order on the sum of a calculation

Hi there,

>   <xsl:for-each select="//referers/referer">
>    <xsl:sort select="@page" order="ascending"/>
<snip/>
>    </xsl:for-each>

The above xsl:sort is sorting on the page attribute in ascending alphabetical, which results in the output you are getting.

Looks like you will need to group by @page to get all the distinct pages and then sort on the calculation of the number of hits. The below is untested and untried.

<!-- Select all referer elements -->
<xsl:variable name="refererPages" select="//referers/referer" />
<!-- Select the distinct referer elements -->
<xsl:variable name="distinctRefererPages" select="$refererPages[@page != preceding::referer/@page]" />

<xsl:for-each select="$distinctRefererPages">
 <!-- Sort by sum of the hits attribute of all referer elements where the page attribute is the same as that in the $distinctRefererPages -->
 <xsl:sort select="sum(//referers/referer[@page = current()/@page]/@hits)" order="descending" />
</xsl:for-each>

HTH,
Joshua

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