The OCCURS clause defines tables and provides the basis for
  subscripting and indexing.  It eliminates the need for separate
  entries for repeated data items.

  Format 1 -

   OCCURS table-size TIMES

      [ { ASCENDING  } KEY IS {key-name} ... ] ...
      [ { DESCENDING }                       ]

      [ INDEXED BY {ind-name} ... ]

  Additional Information (explode) :

• table-size
• key-name
• ind-name