Indicates the internal organization of the file.  It takes the
  following form:

  ORGANIZATION = org

  org  Is a character expression with one of the following
       values:

  'SEQUENTIAL'          Records are stored in the order that
                        they are written. Access mode must be
                        sequential, append, or direct (fixed-length
                        records only). (*DEFAULT FOR NEW FILES*)

  'RELATIVE'            Records are stored in numbered positions.
                        Access mode must be direct or sequential.

  'INDEXED'             Records are stored according to the values
                        of their keys. Access mode must be indexed
                        or sequential.

  The default for an existing file is its current organization.