VMS Help FORTRAN, /DML  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  /[NO]DML                D=/NODML

  Invokes the Fortran Data Manipulation Language (DML) preprocessor
  before the compiler.  The preprocessor 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.

  The default is not to invoke the DML preprocessor.

  Use the /SHOW=PREPROCESSOR qualifier 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 Oracle DBMS Programming Reference Manual.

  Any switches preceding the /DML qualifier in the command line are
  ignored.

                                 NOTE

          Unless  you  specify  the  /DEBUG  qualifier,   the
          intermediate  file  is  deleted  by the Fortran DML
          preprocessor  immediately  after   compilation   is
          complete, and 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.