Hi all

I'm trying to get my head around the following problem... I've got a doc
with the following structure:

<item>
    <keywords>Chair, Sofa, Cabinet</keywords>
</item>
<item>
    <keywords>Chair, Sofa</keywords>
</item>
<item>
    <keywords>Cabinet</keywords>
</item>
<item>
    <keywords>Chair</keywords>
</item>

What I need to get out of that is a list of unique keywords, eg:

<keyword>Cabinet</keyword>
<keyword>Chair</keyword>
<keyword>Sofa</keyword>

Anyone know how I can do this? I'm using XSL/XPath 1.0.

I would do this in two stages - the first is to create a nodeset of
words by processing each <keywords> element using a recursive named
template to get something like:

<word>Chair</word>
<word>Sofa</word>

Once you have stage 1 complete, use the node-set extension function of
your processor to turn the result-tree-fragment into a nodeset, then
use grouping to do a distinct on the values.

Splitting a string:
http://www.dpawson.co.uk/xsl/sect2/N7240.html#d9590e343

Grouping:
http://sources.redhat.com/ml/xsl-list/2000-07/msg00458.html

cheers
andrew