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COBOL, DATA_DIVISION, clauses, COLUMN_NUMBER, 2format_screen_description
 *Conan The Librarian 

  Format 2 - Screen Description

   COLUMN NUMBER IS [PLUS] { identifier-1 }
                           { integer-1    }

  1 - identifier-1 

  is an elementary unsigned numeric integer data item.  It cannot be
  subscripted.

  2 - integer-1 

  is an unsigned integer value.
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