<xsl:sort select="string-join($ORDER_BY_TOKEN,',')"/>
do the job replacing ',' by some other separator if there is any
possibility of , appearing in any of the fields.
You should do what I meant here, not what I wrote, unfortunately there
is not much correlation between the two, so I'll rephrase.
If you are doing it in one pass, then you want
<xsl:sort
select="string-join(for $i in $ORDER_BY_TOKEN return
*[local-name()=$i],',')"/>
If you are generating a stylesheet you want
<xsl:element name="xsl:sort"
select="concat('string-join((', $ORDER_BY, ')'','')')"/>
David
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