Organization

 The  'organization'  is  a  value  that   specifies   the   file
 organization.   If  you  are  accessing  an  existing  file, the
 specified  organization  must  match  the  organization  of  the
 existing file; if it does not, an error occurs.  The choices for
 this parameter  are  SEQUENTIAL,  RELATIVE,  and  INDEXED.   The
 default is SEQUENTIAL.  The parameter choices are as follows:

  o  SEQUENTIAL file organization specifies that file  components
     are  stored  one after the other, in the order in which they
     were entered  into  the  file.   VSI  Pascal  supports  this
     organization   for   files   on  disk.   This  is  the  only
     organization  supported  for  files  on  magnetic  tape,  on
     terminals, on card readers, and on line printers.

  o  RELATIVE  file  organization  consists  of   a   series   of
     fixed-length    component    positions    (cells)   numbered
     consecutively from 1 to n.  The numbered, fixed-length cells
     enable  VSI  Pascal  to  calculate  the component's physical
     position in the file.  The cell numbers are called  relative
     component numbers.  VSI Pascal supports this organization on
     disk files only.

  o  INDEXED file organization specifies that, in addition to the
     stored  components,  there exists at least a primary key and
     possibly  alternate  keys  (first  alternate   key,   second
     alternate  key,  and so forth).  VSI Pascal uses the primary
     key to store components and uses a program-specified key  or
     keys   to   retrieve   data.    VSI   Pascal  supports  this
     organization on disk files only.