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You didn't say what language you are using to do the sort. In XSLT2 for
example you could use something like
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output indent="yes"/>
<xsl:template match="x">
<x>
<xsl:perform-sort select="*">
<xsl:sort select="string-join(for $i in tokenize(.,'\.') return
format-number(number($i),'000000'),'.')"/>
</xsl:perform-sort>
</x>
</xsl:template>
</xsl:stylesheet>
$ saxon8 srt.xml srt.xsl
<?xml version="1.0" encoding="UTF-8"?>
<x>
<art>1</art>
<art>1.1</art>
<art>2</art>
<art>2.1</art>
<art>2.1.1</art>
</x>
Of course if your example is really representative, and all your numbers
are single digits then you don't need to split things up and rejoin, you
can just use
<xsl:sort select="."/>
which of course is also easy to do in xslt1
David
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