regtral

from The Free On-line Dictionary of Computing (8 July 2008)

REGTRAL

   Mentioned in Attribute Grammars, LNCS 323, p.108.

   Relational Language.  Clark & Gregory.  First parallel logic
   language to use the concept of committed choice.  Forerunner
   of PARLOG.  "A Relational Language for Parallel Programming",
   K.L. Clark et al, Proc ACM Conf on Functional Prog Langs and
   Comp Arch, pp.171-178, ACM 1981.