RE: [xsl] Muenchian grouping help - removing 'duplicates' from a nodeset

Subject: RE: [xsl] Muenchian grouping help - removing 'duplicates' from a nodeset
From: "Michael Kay" <mhk@xxxxxxxxx>
Date: Thu, 9 Oct 2003 16:38:17 +0100
If you use normalize-space() when indexing the values, then it's a good
idea to use it when retrieving them as well.

Without more context, it's hard to know whether this is your bug or not.

Michael Kay

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Laura@xxxxxxx
> Sent: 09 October 2003 14:32
> To: XSL-List@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] Muenchian grouping help - removing 
> 'duplicates' from a nodeset
> Hi all,
> This is probably quite a basic question, but I've been 
> scratching my head over it all day and I could use some guidance.
> I have an XML file which is going to be used as a 
> "dictionary" for an internationalised web application. The 
> structure of he file is like so:
> <dictionary>
> 	<text>foo</text>
> 	<text>bar</text>
> 	<text>foo</text>
> 	<text>baz</text>
> 	<text>foobar</text>
> 	(etc...)
> </dictionary>
> The file contains quite a few "duplicates" (in terms of the 
> text() content of the node), and I've been trying to figure 
> out a way to strip out all the dupicates, leaving me with an 
> XML file with only unique <text> elements. 
> I wrote an XSL to identify all the duplicates, and print them 
> out [basically
> using: test="current() = following-sibling::text or current() 
> = preceding-sibling::text"] But now I want to actually remove 
> the duplicates and create a new XML file in the output tree. 
> I think they way to do this is via Muenchian grouping. I know 
> what I need to
> do: group all the <text> elements by their text() content; 
> and select only the first one in each group. But I've 
> followed the guidelines on Jeni Tennison's XSLT pages and I 
> can't seem to get my head around how keys actually work. 
> So far I have tried (these are obviously just sample lines 
> from my XSL):
> <xsl:key name="text-by-content" match="text" 
> use="normalize-space(text())" />
> And then:
> <xsl:apply-templates select="text[generate-id(.) = 
> generate-id(key('text-by-content', text())[1])]"/>
> But this produces no output at all. 
> I'm sure what I'm missing is blatently obvious... :-/
> I'm using Sablotron 1.0, if that makes any difference. 
> Thanks in advance,
> Laura.
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