optran

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

OPTRAN

   Specification language for attributed tree transformation
   writetn by R. Wilhelm, U Saarlandes in the early 1980's.

   ["POPSY and OPTRAN Manual", ESPRIT PROSPECTRA Project Item
   S.1.6-R.3.0, U Saarlandes (Mar 1986)].