customProperties or similar for words in a field?

[Dr. Hawkins]

On Sat, Oct 10, 2015 at 8:21 AM, J. Landman Gay <jacque at hyperactivesw.com>
wrote:

>
> This sounds like a job for the merge command.
>
>
thanks,but that's a one-way trip.  If the user changes something, I need to
know which piece, as it shows up elsewhere.  (And, potentially the user
could change the  base text, too, which would need to be save!)
I need to have wa way to keep a handle on the source of the changed word.