(Fwd) out-of-line markup (was Re: [xml-dev] manipulating whole

Replying to David G. Durand replying to  Simon St.Laurent 

> >Maybe Ted Nelson was right about out-of-line markup having advantages.
> [...] You have
> to either update the offsets as the underlying text changes, or create a
> text model that does that for you. 

There is a very successfull, widely deployed implementation of
out-of-line markup, which also managed that problem:

ctags (and etags)

Regards,
Peter Jacobi