Hi,
Thank you all very much for taking the time to reply. It was all very informative.
I have now sent off samples, using your advice, to the publishers and await their appraisal.
My initial thought was by having the indexer involved at the start, ie, with the original Word file, prior to typesetting, and marking this file up for indexing. This would have the effect of having the keywords highlighted with some sort of code that could be used in a search and replace routine. The printed index could be compiled from this mark-up then, using these codes, the href's could have been inserted.
However, this would drastically change the way in which indexes are compiled and the way indexers work. Maybe that's what needs to happen.
Cheers,
John.
PS: As an aside, Dale, my sister and brother-in-law live in Grass Valley on Rattlesnake Road. You may well have rubbed shoulders with them! Small world, eh?