Rhetorical Structure Theory
From AGIRI.org
Some refs on RST are
The original, definitive paper on RTS is available via
http://www.sfu.ca/rst/05bibliographies/access.html
in an annoying format (separate image files for each page).
Whether or not one actually wants to use RST as a guide for implementing conversational interaction in one's AGI system, it's worth studying as the classic attempt to make a systematic theory of discourse...
