Echidna - Constraint logic programming embedded in an object-oriented
language. The syntax is an extension of Edinburgh Prolog. "Hierarchical
Arc Consistency Applied to Numeric Processing in Constraint Logic
Programming", G. Sidebottom et al, TR-91-06, CSS-IS, Simon Fraser U, and
Comp Intell 8(4) (1992).
ftp://cs.sfu.edu/pub/ecl/papers
info: expert@cs.sfu.edu
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