Invokes the Fortran Data Manipulation Language (DML) preprocessor
  before the compiler.  The preprocessor produces an intermediate
  file of Compaq Fortran 77 source code in which Fortran DML commands
  are expanded into Compaq Fortran 77 statements.  The compiler is
  then automatically invoked to compile this intermediate file.

  Use the /SHOW=PREPROCESSOR qualifier in conjunction with the /DML
  qualifier to cause the preprocessor-generated source code to be
  included in the listing file.  For more information on the DML
  preprocessor, see the VAX DBMS Programming Reference Manual.

                                 NOTE

          Because the intermediate file  is  deleted  by  the
          Fortran    DML   preprocessor   immediately   after
          compilation is  complete,  the  Language  Sensitive
          Editor  and  the Source Code Analyzer cannot access
          the source program when you use the /DML qualifier.
          The  results  with the /DEBUG qualifier reflect the
          intermediate source.