Re: How to sort by elements of a function output?

I am using Saxon-SA9.1.0.6 to transform the following XML file:
...
with the stylesheet
...
    <xsl:function name="my:MakeTableRow">
        <xsl:param name="team"/>
        <xsl:param name="matches"/>
        <tr>
...
        </tr>
    </xsl:function>
...
            <xsl:for-each-group select="/results/match" group- by="team">
                <xsl:variable name="tableRow"
select="my:MakeTableRow(current-grouping-key(),current-group())"/>
                <xsl:copy-of select="$tableRow"/>
            </xsl:for-each-group>

In the tag <xsl:for-each-group select="/results/match" group-by="team">
I would like to sort the outcome by the $tableRow/td[8] contents (i.e.
the points) .
How do I do that?

The approach

<xsl:for-each-group select="/results/match" group-by="team">
<xsl:sort select="my:MakeTableRow(current-grouping- key(),current-group())/td[8]"
order="descending"/>
<xsl:copy-of select="my:MakeTableRow(current-grouping- key(),current-group())"/>
</xsl:for-each-group>

Any suggestions?

  <xsl:variable name="rows" as="element(tr)+">
    <xsl:for-each-group select="/results/match" group-by="team">
      <xsl:copy-of
   select="my:MakeTableRow(current-grouping- key(),current-group())"/>
    </xsl:for-each-group>
  </xsl:variable>
  <xsl:for-each select="$rows">
     <xsl:sort select="td[8]"/>
     <xsl:copy-of select="."/>
  </xsl:for-each>

  <xsl:variable name="rows" as="element(xhtml:tr)+">
    <xsl:for-each-group select="/results/match" group-by="team">
      <xsl:copy-of
   select="my:MakeTableRow(current-grouping- key(),current-group())"/>
    </xsl:for-each-group>
  </xsl:variable>
  <xsl:for-each select="$rows">
     <xsl:sort select="xhtml:td[8]"/>
     <xsl:copy-of select="."/>
  </xsl:for-each>

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