Classes and Categories of Data

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Table 1. Class, category, and usage of data items
Class of elementary data items2 Category Usage
Alphabetic Alphabetic DISPLAY
Alphanumeric

Numeric-edited
Alphanumeric-edited
Alphanumeric

DISPLAY
Numeric Numeric

DISPLAY (type zoned decimal)
NATIONAL (type national decimal)
PACKED-DECIMAL (type internal
decimal)
COMP-3 (type internal decimal)
BINARY
COMP
COMP-4
COMP-5

Internal Floating-Point1

COMP-1
COMP-2

External Floating-Point1 DISPLAY
Boolean1 Boolean1 DISPLAY
DBCS1

DBCS1
DBCS-edited1

DISPLAY-1
Start of changeNational1End of change Start of change

National1
National-edited1
National numeric-edited1

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Start of changeNATIONALEnd of change
Date-Time1

Date1
Time1

DISPLAY
PACKED-DECIMAL

Timestamp1 DISPLAY
  1. IBM® Extension
  2. The class of group items is alphanumeric for all categories.
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