Sorry,

I forgot to mention that the keywords are supplied to the processor as a 
parameter and are therefore a string of white-space separated values.

I've just (I think) found a solution with SAXON:

<xsl:for-each select="//item[.//* = saxon:tokenize($keywords)]">

If its right then all I have to do is work out how to get SAXON going with my 
server scripts!

Cheers,
Richard

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list