PRC National Standard GB 18030—2000
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Information Technology - Chinese Ideograms Coded
Characters Set for Information Interchange –
Extension for the Basic Set
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Introduction
1. Scope
.1 Abstract
This standard, as a mandatory code standard of GB 2311
Chinese ideograms
enc
oding system, sets the primary Chinese ideogram characters and their hexadecimal
representation of binary codes for information interchange, it is an extension of the GB
2312.
The following are set forth in this standard:
Background for publishing this standard
Repertoire collected in this standard
Overall encoding structure and rules
Code position arrangement of characters
Allocation of code positions
Attachments to this standard (Appendix A, Appendix B, Appendix C and Appendix D)
.1 Background
GB 2312-80, the primary collection of Chinese coded graphic characters published in
1981 as a national standard, covers only 6,763 Chinese characters. In 1995, GBK
(Chinese Internal Code Specification) for GB Extension was published. It is the super set
of GB and totally compatible with GB 2312-80. GBK expands its characters set to 20,902
characters.
In order to cover and process more Chinese characters and meet the requirement for
Chinese customers (such as Banking and Posting etc) on super set of Chinese
characters processing capability and keep the compatible with the existing GB 2312-80
and GBK encoding system, GB 18030 for super set of Chinese characters code standard
is released.
In GB 18030, one-byte, two-byte and four-byte encoding systems are adopted. The total
capability is over 1.5 millions of code positions. Currently, GB 18030 contains more than
27,000 Chinese characters which have been defined in the latest version Unicode 3.0.
This standard provides utter solutions for the urgent needs of Chinese characters used in
names and addresses.
.1 Objective
This standard makes concrete stipulations on one- and two-byte coded Chinese
ideogram characters, and also makes stipulations on the systematic structure of four-byte
encoding system.
This standard adopts the following definitions:
Repertoire
A definitive set of characters expressed in coded character set.
Character
One element in an element set used for organizing, control or expressing data.
