Re: [xsl] Removing duplicates after list is sorted

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Dear Nicole,

At 01:39 PM 5/10/2006, you wrote:
> <xsl:apply-templates select="//Document/Report">
>                                 <xsl:sort order='ascending'
> select='@base'/>
>                                 <xsl:sort order='descending'
> select='../@CREATIONTIME'/>
>                         </xsl:apply-templates>

In XSL 1.0 you can't de-duplicate within the results of your sort, 
but you can de-duplicate before sorting, which has the same effect:

<xsl:apply-templates select="//Document/Report[ deduplication logic 
goes here ]">
  <xsl:sort ... </xsl:apply-templates>

inside the predicate (the bracketed expression, used as a "filter 
expression"), place the same test as you are currently using in the 
template to de-duplicate.

As you can imagine, when things get very complex you may not want to 
do it this way, at which point you will want to consider whether to 
try to handle it entirely in 1.0 (not built for the job, but 
solutions have been developed), or in 2.0 (which is built for the job 
and much better at this sort of thing generally).

I hope that helps,
Wendell



======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
----------------------------------------------------------------------
  Mulberry Technologies: A Consultancy Specializing in SGML and XML
======================================================================