||Browsing Cocoa with F-Script|
You wrote some closing things and mentioned an object might be modified by callback. I fiddled with callback routines when building a navigation system on my newton message pad. I missed succeeding with this and think I missed something fundamental, something that I should have had from a more axiomatic approach and was getting burned on.
I don't know that I am asking for definitions of callback right now, I think what I am trying to say is that I am intrigued by your formal knowledge and first attempts to "make a story about it" and, with the term meta, it bespeaks a familiarity with the formal pregenitors of next step in more general object oriented language theory.