RE: [xsl] forum threads sorting

["McNally, David" <David.McNally@xxxxxxxxxx>]

I'm not entirely confident in my logic, but as far as I can tell, this
works:

<xsl:template match="/">
	<xsl:for-each select="//aaa[not(aaa)]">
		<xsl:sort select="translate(@vl,'-','')"
order="descending"/>
		<xsl:variable name="thisnode" select="generate-id(.)"/>
		<xsl:variable name="thisdate"
select="translate(substring-before(@vl,' '),'-','')"/>
		<xsl:if test="not(ancestor::aaa[last()]//aaa[not(aaa) and
generate-id(.) != $thisnode]/@vl[translate(substring-before(.,' '),'-','') >
$thisdate])">
			<xsl:apply-templates
select="ancestor-or-self::aaa[last()]"/>
		</xsl:if>
	</xsl:for-each>
</xsl:template>

Basically I'm iterating through the leaf nodes in date order, testing each
one to see if it has the latest date within its subtree.  If so - process
it's ancestor aaa element.  I'm only looking at the date, but I guess some
more string handling could be added to deal with the time as well.

David.
--
David McNally            Moody's Investors Service
Software Engineer        99 Church St, NY NY 10007 
David.McNally@xxxxxxxxxx            (212) 553-7475 


> -----Original Message-----
> From: Oleg Tkachenko [mailto:olegt@xxxxxxxxxxxxx]
> Sent: Tuesday, February 26, 2002 9:54 AM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] forum threads sorting
> 
> 
> 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
> 
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 


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