Trilogy - Paul Voda, UBC, 1988. Logic programming
language with numerical constraint-solving over the natural numbers.
Syntactically a blend of Prolog, LISP and Pascal. Contains three types of
clauses: predicates (backtracking but no assignable variables), procedures
(if-then-else but no backtracking; assignable variables), and subroutines
(like procedures, but with input and system calls; callable only from top
level or from other subroutines). "The Constraint Language Trilogy:
Semantics and Computations", P. Voda, Complete
Logic Systems, 741 Blueridge Ave, North Vancouver BC, V7R 2J5. Papers by
Voda, and BYTE review.[?]
Comments, Experience, Additions
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