3.1  DEC Fortran Language Reference Manual

  3.1.1  Section 8.2.1 - Input Rules for FORMAT Statements
  The FORTRAN-77 standard does not specify what the de-
  fault BLANK value should be for preconnected units or
  internal files.  Digital Fortran for OpenVMS (both VAX and
  Alpha) has chosen 'ZERO' in order to preserve compatibility
  with programs depending on the FORTRAN-66 behav-
  ior which was to always treat blanks as zeroes.  However,
  the Fortran 90 standard explicitly specifies the default for
  internal files as 'NULL', which conflicts with the default
  used by Digital Fortran for OpenVMS (which conforms to
  FORTRAN-77).  The Fortran 90 standard does not specify
  the default BLANK= behavior for preconnected units.  The
  result is that programs which depend on a particular imple-
  mentation's defaults for BLANK= may produce unexpected
  results on other platforms or when compiled using Fortran

  90.

  This issue can be especially troublesome when a program
  depends on short field termination (see section 8.8 of  DEC

  Fortran Language Reference Manual      ) and is compiled us-
  ing a Fortran 90 compiler which, by default, blank pads short
  records.

  In order to avoid problems caused by inconsistencies in the
  default, Digital recommends adding an explicit BN or BZ for-
  mat edit descriptor, as desired, in the format used for internal
  READ or DECODE statements.  For preconnected units, BN
  or BZ should also be added, or these units can be explicitly
  opened so that the BLANK= behavior is consistent.

  3.1.2  Section 11.2.6 - OPTIONS Directive

  This directive is now supported on VAX systems.  (V6.3-155)

  In addition, a new /WARNINGS qualifier may be specified on
  the OPTIONS directive.  See   Section 2.2.1.3 for details.  (V6.3-
  155)

  3.1.3  Table C-7 - BLAS Basic Set Routines

  For routines xROT and xROTG, the datatype for the first
  rotation element argument    c is REAL  *4 for CSROT and
  CROTG and REAL      *8 for ZDROT and ZROTG. The datatype
  for the second rotation element argument     s is the same type
  as the array argument.

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