Re: enriched-mode and switching major modes.

[Stefan]

>     Without thinking too much about it, I'd say that overlays seem to be
>     a better fit: each node is an overlay, the node's attributes can be stored
>     in the overlay's properties, the text corresponding to a node can be 
> stored
>     directly in the buffer and retrieved by (buffer-substring (overlay-start 
> o)
>     (overlay-end o)), ...

> Overlays are no good for this because they will be lost completely
> if you cut and paste.  If you copy the text of a buffer
> to another buffer, the overlays won't come along.  (That is the purpose
> of overlays.)

> This information has to be *part of the text*.

XEmacs's version of overlays (called extents) can be part of the text
(which is a property they call `duplicable').  We could do the same.


        Stefan