Use the table below to compare alphanumeric (DISPLAY),
DBCS (DISPLAY-1), and Unicode (NATIONAL)
encoding and to plan storage usage.
Table 1. Encoding
and size of alphanumeric, DBCS, and national data
| Characteristic |
DISPLAY |
DISPLAY-1 |
NATIONAL |
| Character encoding unit |
1 byte |
2 bytes |
2 bytes |
| Code page |
EBCDIC |
EBCDIC DBCS |
UTF-16BE1 |
| Encoding units per graphic character |
1 |
1 |
1 or 22 |
| Bytes per graphic character |
1 byte |
2 bytes |
2 or 4 bytes |
- Use the
CODEPAGE compiler
option to specify the EBCDIC code page that is applicable to alphanumeric
or DBCS data.
- Most characters are represented in UTF-16 using one encoding unit.
In particular, the following characters are represented using a single
UTF-16 encoding unit per character:
- COBOL characters A-Z, a-z, 0-9, space, + - * / = $ , ; . " ( ) > <
:'
- All characters that are converted from an EBCDIC or ASCII code
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