Consultor Eletrônico

Double Byte Character Set (DBCS) facts and information.

Double Byte Character Set (DBCS) facts:
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The following are the double byte character sets that Progress
supports:

- Shift-JIS and EUCJIS for Japanese.
- GB2312 for Simplified Chinese.
- Big-5 for Traditional Chinese.
- KSC5601 for Korean.

DBCS are used to display languages that use more than 255
characters.

Some languages have more than one DBCS standard. For example,
Taiwan uses Big-5, TCA and CNS. However, out of these DBCS
Progress supports the Big-5 character set.

Mixed character sizes are supported. In other words, DBCS's
contain both single and double byte characters.

All DBCS provide support for the ASCII standard for character
values below 128. These characters are also supported with
double byte equivalents. This means that you can enter the
ASCII capital-A (ASCII value 65) as a single byte character or
you can enter the double byte two-character combination that
produces the double byte capital-A. DBCS may also contain
international characters (both language and symbols) as single
byte or double byte characters.

Since DBCS may contain single and double byte characters, the
string length (number of characters) may or may not be equal
to the storage length (six DBC's = twelve bytes of storage).
Also, since font size affects display size, the display length
(number of columns) may or may not be equal to the storage
length (using a font that displays DBC's in single columns
means that a four character double byte string takes up four
columns of display space but 8 bytes of storage).

The following are the Progress components that are DBE:

UIB, Results, Data Dictionary, Data Admin, TranMan 2
Client for MS Windows using an MS IME
Batch client for UNIX (_progresa)
Server for UNIX, NT
E/SQL-C and HLC for MS Windows
Oracle Dataserver (7.3D)
Japanese Motif Client (7.3D)


Progress Software Technical Support Note # 16392