[xsl] sorting problem

[DPawson@xxxxxxxxxxx]

Given xml

   <r id="d0e1588">
      <bibno>050220</bibno>
      <play-time>08:15</play-time>
      <m100>
         <surname>Tootell</surname>
         <f-name>Betty</f-name>
      </m100>
       <m655>
         <cat>Java</cat>
         <term2>Indonesia</term2>
         <term3>Southeast</term3>
         <term4>Asia</term4>
         <term5>Vehicle Failures</term5>
         <term6>Accidents</term6>
         <term7>Air and Space Transport</term7>
         <term8>Public Safety</term8>
         <term9>Social Services</term9>
         <term10>Social Sciences</term10>
      </m655>
      <readers>Gretel Davis</readers>
      </r>

lots of r elements in a <doc> wrapper.

the termX elements are 'inverse' i.e. from specific to general.
they also vary in 'depth' from 2 to 10.

I need to sort the r elements, using a revese order on m655/termX

  <xsl:template match="doc">
    <doc>
      <xsl:apply-templates select="date"/>
    <xsl:for-each select="r">
      <xsl:sort select="m655/term10"/>
     <xsl:sort select="m655/term9"/>
     <xsl:sort select="m655/term8"/>
     <xsl:sort select="m655/term7"/>
     <xsl:sort select="m655/term6"/>
     <xsl:sort select="m655/term5"/>
     <xsl:sort select="m655/term4"/>
     <xsl:sort select="m655/term3"/>
     <xsl:sort select="m655/term2"/>
     <xsl:sort select="m655/term1"/>
     <xsl:sort select="m655/cat"/>

    <!-- Copy the current node -->
    <xsl:copy>
      <!-- Including any attributes it has and any child nodes -->
      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:for-each>
</doc>
  </xsl:template>

Sorts out the records, but by nesting.
something like
  a
  b
  ...
  p
  a   (I.e. this is at a lower level than the previous one)
  c
  ...
 


Looking for inspiration as to how I might produce a sort that
works 'across' the differing levels.

Any advice appreciated.

Regards DaveP

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