Dear Matthias:
I look forward to getting your tech. report and to look at your book.
Interesting news about Java.

We also work on the issue of extensible/reusable software, but using the concept
of strategies:

http://www.ccs.neu.edu/research/demeter/biblio/strategies.html

Strategies, who are graphs themselves,
are partial revelations about how the class graph looks like.
Strategies generalize the work with Jens Palsberg which appeared in TOPLAS.
I can imagine that they would fit very well into DrScheme to 
ease structural evolution.

Let's keep in touch.

Best regards,
-- Karl


From matthias@cs.rice.edu Thu Jan 22 13:07:54 1998
From: Matthias Felleisen <matthias@cs.rice.edu>
To: lieber@ccs.neu.edu
Reply-to: matthias@rice.edu

We have used these ideas for three years in DrScheme now, we just didn't
know about patterns. 

Our goals is to look at the larger issue of extensible/reusable software; 
the paper is a first start. 

The mixin things were well received at POPL (just came back). Guy Steele
seems to appreciate the re-usability aspect of them and wants to push for a
partial inclusion in the Cartwright-Steele revision of Java's type system. 

-- Matthias

P.S. A small porition of our paper was worked into chapter 9 of
a Little Javar that Dan and I wrote and that just came out w/ MIT Press. 
Mitch has a copy now. You may enjoy reading that part.