I'm trying to figure out how to do multi-level grouping.
Anyone a good sugggestion?

Example XML:

<Computers>
    <Hardware>
        <Hardisks>
            <Product>
                Seagate 200GB
            </Product>
            <Price>
                129,-
            </Price>
        </Hardisks>
    </Hardware>
    <Hardware>
        <Hardisks>
            <Product>
                Maxtor 160GB
            </Product>
            <Price>
                109,-
            </Price>
        </Hardisks>
    </Hardware>
    <Hardware>
        ...
    </Hardware>
    ...
</Computers>

Needed 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>

Robert Zegwaard

Most grouping in XSLT 2.0 is done using the <xsl:for-each-group> declaration.

Perhaps something like <xsl:for-each-group select="//Product" group-by="../name()">. Depends on whether the parent name is unique or not though.

/- Sam Judson : Wrox Technical Editor -/

You've asked the same question on the xsl-list at mulberrytech.com - please don't cross-post.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference