Looks to me like

<xsl:template match="Computers">
  <xsl:for-each-group select="*" group-by="name()">
    <xsl:element name="{current-grouping-key()}">
      <xsl:for-each-group select="current-group()/*" group-by="name()">
        <xsl:element name="{current-grouping-key()}">
          <xsl:copy-of select="current-group()"/>

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: Robert Zegwaard [mailto:data@xxxxxxxxx] 
> Sent: 09 January 2008 14:17
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  XSLT 2.0 Multi-level grouping
> 
> Hi,
> 
> I'm in need for an multi-level grouping routine using XSLT 
> 2.0 I can't figure out houw to do this.
> Can anyone give me a good hint?
> 
> Robert Zegwaard
> 
> XML (INPUT)
> ---------------------------------------
> <?xml version="1.0" encoding="UTF-8"?>
> <Computers>
>     <Hardware>
>         <Hardisks>
>             <Product>
>                 Seagate 200GB
>             </Product>
>             <Price>
>                 129,-
>             </Price>
>         </Hardisks>
>     </Hardware>
>     <Hardware>
>         <Hardisks>
>             <Product>
>                 Maxtor 160GB
>             </Product>
>             <Price>
>                 109,-
>             </Price>
>         </Hardisks>
>     </Hardware>
>     ...
>     <Software>
>         ...
>     </Software>
>     ...
> </Computers>
> 
> ---------------------------------------
> Desired XML (OUTPUT)
> ---------------------------------------
> <Computers>
>     <Hardware>
>         <Hardisks>
>             <Product>
>                 Seagate 200GB
>             </Product>
>             <Price>
>                 129,-
>             </Price>
>              <Product>
>                 Maxtor 160GB
>             </Product>
>             <Price>
>                 109,-
>             </Price>
>         </Hardisks>
>         <Monitors>
>             ...
>         </Monitors>
>         ...
>     </Hardware>
>     <Software>
>         <Office>
>             ...
>         </Office>
>         ...
>     </Software>
> </Computers>