XML to Table

Hi, i would like create a table from a xml with a format like this:

<XML>
 <ROWSET>
   <ROW num="1">
     <A>asdf</A>
     <B>asd</B>
     <C>asdf</C>
     <D>asdf</D>
     <E>ad</E>
     ...
   </ROW>
   <ROW num="2">
     <A>asdf</A>
     <B>asdf</B>
     <D>asdf</D>
     <E>asdf</E>
     ...
   </ROW>
   <ROW num="3">
     ...
   </ROW>
   ...
 </ROWSET>
 <DETAIL>
   <COLUM nom="A" class="a" ord="1"/>
   <COLUM nom="B" class="b" ord="2"/>
   <COLUM nom="C" class="c" ord="3"/>
 </DETAIL>
</XML>

I'm using a xsl like this to keep the fields that i need

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
 <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
 <xsl:key name="a" match="//DETALLE/CAMPO" use="@nom"/>
 <xsl:template match="XML">
   <XML>
     <ROWSET>
       <xsl:for-each select="ROWSET/ROW">
         <xsl:variable name="row" select="@num"/>
         <ROW>
           <xsl:attribute name="num"><xsl:value-of 
select="$row"/></xsl:attribute>
           <xsl:for-each select="//DETAIL/COLUMN">
             <xsl:variable name="column" select="@nom"/>
             <xsl:choose>
               <xsl:when test="//ROW[(_at_)num = $row]/*[name() = $column]">
                 <xsl:copy-of select="//ROW[(_at_)num = $row]/*[name() = 
$column]"/>
               </xsl:when>
               <xsl:otherwise>
                 <!-- To create empty node that is absent with his label,
                      ex. <C></C> at the second node -->
               </xsl:otherwise>
             </xsl:choose>
           </xsl:for-each>
         </ROW>
       </xsl:for-each>
     </ROWSET>
   </XML>
 </xsl:template>
</xsl:stylesheet>

Finally I use another xsl to give format of table.

The question is that i have problems with the first step, the xsl is too 
slow and i can't create the node that doesn't exist in the row and that I 
want to visualize.
I can change the structure of <DETAIL></DETAIL> if it would be necessary.

If it's possible i would prefer the use of one only xml. can I do it?


Thanks to all.

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