Source : Free On-Line Dictionary of Computing

Goffin
     
         A {definitional constraint language} for
        {declarative} parallel programming.  Goffin systematically
        integrates {equational constraint}s and functions within a
        uniform framework of {concurrent} programming.
     
        Goffin is an embedding of a functional language kernel
        ({Haskell}) into a layer of constraint logic, which allows
        {logical variable}s inside functional expressions.  In order
        to preserve {referential transparency}, functional {reduction}
        suspends until logical variables become bound.
     
        Logical variables are bound by equational constraints, which
        impose relations over expressions.  Hence, constraints are the
        means to structure the concurrent reduction of functional
        expressions.
     
        (1995-02-21)