The  VARYING  OF  CHAR  user-defined  types  are  a  VSI  Pascal
  extension  that  provides  a  way  of  declaring variable-length
  character strings with a compile-time maximum  length.   If  you
  require portable code, use the STRING predefined schema types to
  specify variable-length character strings.

  Syntax:

     VARYING [upper-bound] OF [[attribute-list]] CHAR

  The 'upper-bound' is an integer in  the  range  from  1  through
  65,535 that indicates the length of the longest possible string.

  The 'attribute-list' is one or more  optional  identifiers  that
  provide  additional information about the VARYING OF CHAR string
  components.

  To assign values to fixed-length character strings, you can  use
  a  character-string constant (or an expression that evaluates to
  a character string).  When assigning into fixed-length  strings,
  the  compiler  adds  blanks  to extend a string shorter than the
  maximum characters declared.  If you  specify  a  string  longer
  than  the maximum characters declared, an error occurs.  You can
  also use an array constructor as long as you specify  characters
  for   every   component   of  the  array  as  specified  in  the
  declaration.

  Although a VARYING OF CHAR is a distinct type, it possesses some
  of  the  properties  of  both record and array types.  A VARYING
  string is actually stored as though it were a  record  with  two
  fields,  LENGTH  and  BODY (which are predeclared identifiers in
  VSI Pascal).  The  LENGTH  field  contains  the  length  of  the
  current  character  string;  the BODY field contains the string.
  Either field can be accessed in the same way record  fields  are
  accessed (VARY.LENGTH, VARY.BODY).

  Example:  VARYING [25] OF CHAR

  This VARYING OF CHAR type could have the following values:

     'Wolfgang Amadeus Mozart'
     'Bach'