Source : Free On-Line Dictionary of Computing

Descriptive Intermediate Attributed Notation for Ada
     
         (DIANA) A formerly {de facto standard}
        {intermediate language} for {Ada} programs, developed by Goos
        and Wulf at {CMU} in January 1981.  DIANA is an {attributed
        tree} representation, with an abstract interface defined in
        {Interface Description Language} (Nestor, Lamb and Wulf, CMU,
        1981; Snodgrass(?), 1989(?)).  DIANA resulted from a merger of
        {AIDA} and {TCOL.Ada}.  At the present (2001) it is no longer
        used by the major ADA compilers
     
        ["DIANA - An Intermediate Language for Ada", G.T. Goos et al,
        LNCS 161, Springer 1983].
     
        (2001-09-15)