presenting listeners

[Dave Long]

A while back, Kragen mentioned he'd like to have
a system in which, say, the "ls -l" command would
not only print in columns, for human destructuring
and comprehension, but would also have some sort
of explicit? implicit? markup which would allow
automated interaction with the displayed results.

I ran across the Common Lisp "Presenting Listener"
recently, and it seems close to Kragen's wishes:
<http://kogs-www.informatik.uni-hamburg.de/~moeller/uims-clim/clim-intro.html>

-Dave