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... is at http://www.dafydd.net
Dafydd wrote a PhD thesis that included a description of OO analysis models
that could only change state in response to a globally visible "event". Concurrent
event execution wasn't allowed, and objects could only behave deterministically.
He never thought he'd find a real database system that looked like these models ;-)
See also: http://c2.com/cgi-bin/wiki?DafyddRees