🚀 go-pugleaf

What you are talking about sounds like what was done for TEN/PLUS.  This
is an editing system that is provided with AIX on IBM RT's.  It featured
an editor capable of editing a large and extensible set of document types
including text files, mail boxes, hierarchical data files, C programs, etc.
The semantics of the editing/browsing/file manipulation are separated
from the semanatics of the application, both internally and at the user
interface.  Thus, deleting a message from a mailbox, a line from a file,
or a file from a directory, are accomplished with the same command by
the user, but with different results in the system.

The system is extensible and features a scripting language so that simple
applications can be written by non-programmers.  It can also be extended
to new types of files by experienced C programmers.

(Note: This system has been in existence since 1983, but I am unsure
which of the features I have mentioned are actually available on the
RT.)

Spencer
-- 
SPENCER RUGABER
Georgia Insitute of Technology, Atlanta Georgia, 30332
...!{allegra,amd,hplabs,ihnp4,seismo,ut-ngp}!gatech!spencer