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  Construct:    Data Description Entry
 
  Function:     Reserves and names an area of memory for storing an
                item of data, and describes the data to be stored
                there.
 
  Syntax:       Which format?  ◄Data-name►       ◄RENAMES►
                                Condition-name   ◄Constant-name►
 
                                      ┌───────────────────────────────┐
                                      ▼                               │
 ►►─88 condition-name─┬─VALUE─┬──┬──┬─literal-1─┬─────────────────────┬─►
                      │       └IS┘  │           └┬─THROUGH─┬─literal-2┘
                      └─VALUES─┬───┬┘            └─THRU────┘
                               └ARE┘
 
  ►─┬───────────────────────────────────────┬─────►◄
    └┬────┬─┬───┬─┬──┬──FALSE─┬───────────┬─┘
     └WHEN┘ └SET┘ └TO┘        └─literal-3─┘
                                    -♦-