Trying to sort by an unknown attribute

I want to be able to sort a bunch of table rows, but I want to be able
to supply the column to sort by in the XML.   For example:

I want to take the following XML:

<events sortby='name'>
    <event name='name1' rfq='ABC123' sponsor='dan' status='complete' />
    <event name='name2' rfq='BCA321' sponsor='mike' status='pending' />
</events>

and apply the following template:

<xsl:template match="events">
    <xsl:apply-templates>
        <xsl:sort select="{@sortby}" />
    </xsl:apply-templates>
</xsl:template>

but this doesn't seem to work for me.

I am using resin to process the XSLT.

TIA,

Mike O'Connor
mike@xxxxxxxxxxxxxxxxxx


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