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RE: [xsl] Obtaining a list of unique values

Subject: RE: [xsl] Obtaining a list of unique values
From: "Andreas L. Delmelle" <a_l.delmelle@xxxxxxxxxx>
Date: Thu, 8 Jan 2004 18:09:24 +0100

> -----Original Message-----
> From: Sasa Cekrlija
> Given an XML file that contains a list of Items each having an attribute
> Colour with its value,
> is it possible to obtain a list of all unique colours of Items.

In this case, you have a number of options:

- use <xsl:key ...>
- use generate-id()
- use an XPath expression like:
  <xsl:apply-templates select="Item/Field/Value[not(. = preceding::Value)]"

On big XMLs with a lot of nesting, the first definitely deserves preference.
Please check the FAQ for further help on the usage of the above approaches:

for <xsl:key ...>  http://www.dpawson.co.uk/xsl/sect2/N4852.html

for generate-id()  http://www.dpawson.co.uk/xsl/sect2/N4416.html



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