The INHERIT attribute indicates the environment file or files to
  be  inherited  by  a  compilation  unit.   The environment files
  specified by  the  INHERIT  attribute  must  already  have  been
  created   in   compilation  units  (by  either  the  ENVIRONMENT
  attribute or a compilation switch).

  Syntax:

     INHERIT( {name-string},...  )

  The compilation unit inherits  one  or  more  environment  files
  named  by  the  file  specifications  in  the name strings.  The
  default file type for an inherited environment file is .PEN.