Concurrent Prolog A {Prolog} variant with {guarded clause}s and {committed-choice nondeterminism} ({don't-care nondeterminism}) by Ehud "Udi" Shapiro, Yale. A subset has been implemented, but not the full language. See also {Mandala}. ["Concurrent Prolog: Collected Papers", E. Shapiro, V.1-2, MIT Press 1987]. (1994-11-30)