I have a table with eight rows.  Ski conditions for each trail in a park.  Outside of the table, I want to display the greatest value of Changed at_UDT_Value so that the user can see when any record was last updated, not a last updated for each record.  See the code below, which doesn't quite work but I think I'm on to something:

---

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:udt="DotNetNuke/UserDefinedTable" exclude-result-prefixes="udt">
<xsl:output method="xml" indent="yes" omit-xml-declaration="yes" />
<!--
This prefix is used to generate module specific query strings
Each querystring or form value that starts with udt_{ModuleId}_param
will be added as parameter starting with param
-->
<xsl:variable name="prefix_param">udt_<xsl:value-of select="//udt:Context/udt:ModuleId" />_param</xsl:variable>

<xsl:template match="udt:Data" mode="list">
<tr class="dnnGridItem row">
<td style="width:25%">
<xsl:call-template name="EditLink" />
<xsl:value-of select="udt:TrailName" disable-output-escaping="yes" />
</td>
<td style="width:8.33%;text-align:center;">
<xsl:value-of select="udt:Difficulty" disable-output-escaping="yes" />&#160;
</td>
<td style="width:8.33%;text-align:center;">
<xsl:value-of select="udt:Km" disable-output-escaping="yes" />
</td>
<td style="width:8.33%;text-align:center;">
<xsl:value-of select="udt:Miles" disable-output-escaping="yes" />
</td>
<td style="width:50%">
<xsl:value-of select="udt:Conditions" disable-output-escaping="yes" />&#160;
</td>
</tr>
</xsl:template>

<xsl:template match="/udt:UserDefinedTable">
<xsl:variable name="currentData" select="udt:Data" />
<xsl:if test="$currentData">
<table class="dnnFormItem">
<tr class="dnnGridItem row">
<td style="width:25%">
<b>Trail Name</b>
</td>
<td style="width:8.33%;text-align:center;">
<b>Difficulty</b>
</td>
<td style="width:8.33%;text-align:center;">
<b>Km</b>
</td>
<td style="width:8.33%;text-align:center;">
<b>Mi</b>
</td>
<td style="width:50%">
<b>Conditions</b>
</td>
</tr>
<xsl:apply-templates select="$currentData" mode="list">
</xsl:apply-templates>
</table>
<xsl:variable name="lastUpdated">
<xsl:for-each select="udt:Changed_x0020_at_UDT_Value">
<xsl:sort select="." order="ascending" />
<xsl:if test="position() = last()">
<xsl:value-of select="." />
</xsl:if>
</xsl:for-each>
</xsl:variable>
<em>Last Updated: <xsl:value-of select="$lastUpdated" disable-output-escaping="yes" /></em>
</xsl:if>
</xsl:template>

<xsl:template name="EditLink">
<xsl:if test="udt:EditLink">
<a href="{udt:EditLink}">
<img border="0" alt="edit" src="{//udt:Context/udt:ApplicationPath}/images/edit.gif" />
</a>
</xsl:if>
</xsl:template>
</xsl:stylesheet>

My end result should look like:

Trail 1 Condition
Trail 2 Condition
Trail 3 Condition

Last Updated xx/xx/xxxx xx:xx

Perhaps Trail 2 was the latest updated, but I don't want them sorted by last updated.  I guess my question is whether it's possible to loop through the dataset twice essentially, once with the natural sorting order displaying the results, second sorting by last updated and displaying the last result.  In the code above the bold section is where I believe the pulling of update values, sorting and then displaying the last() one.  Should this be somewhere else?

Timo
That's really close! It displays the first record timestamp in the right place, however, no matter how I change it, it doesn't want to sort the records. Removing the position conditional displays all records. The order seems to be the same as the natural order of the table. Using Changed_x0020_at_UDT_Value changed the formatting correctly for displaying but still did nothing for the sort. It appears we'd need to sort by either the original value or ticks as there doesn't appear to be a natural datetime data type for sorting.