On Sat, Jan 21, 2012 at 07:19:26PM +0000, James Cummings scripsit:
> Ah, index-of() that was the thing I was vaguely remembering!  Many thanks!

You're welcome.

But please consider bookmarking

http://www.w3schools.com/xsl/xsl_functions.asp

and

http://www.w3schools.com/xpath/xpath_functions.asp

(or their various friends and relations).  It might not save you any
sanity -- enough functions will start pushing you in the direction of
having to begin to understand the schema type model -- but it will
probably be a net gain for your productivity. :)

-- Graydon