[xsl] forum threads sorting

[Oleg Tkachenko <olegt@xxxxxxxxxxxxx>]

Hello!

Here is a sorting problem I cannot manage:

input xml represents forum threads

<root>
	<aaa vl="2001-12-02 13:56">
		<aaa vl="2002-01-02 12:32">
			<aaa vl="2002-01-03 14:43" />
		</aaa>
		<aaa vl="2002-02-01 13:43" />
	</aaa>
	<aaa vl="2002-01-03 14:54" />
	<aaa vl="2002-02-01 10:44">
		<aaa vl="2002-02-01 10:45" />
	</aaa>
</root>

and stylesheet have to sort threads (root/aaa elements) by last message 
date (taking into account vl attributes in descendants elements).

I can sort by root/aaa dates, but I can't consider descendant messages

<xsl:sort select="translate(@vl, '-, ','')" />

PS. I'm aware of xslt2 and saxon solutions, but unfortunately I need 
pure xslt1 one.

--
Oleg Tkachenko
Multiconn International, Israel


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