CNS 11643
The CNS 11643 character set (Chinese National Standard 11643), also officially known as the Chinese Standard Interchange Code or CSIC (Chinese: 中文標準交換碼), is officially the standard character set of Taiwan (Republic of China). In practice, variants of the related Big5 character set are de facto standard.
| Alias(es) | CSIC (Chinese Standard Interchange Code) |
|---|---|
| Language(s) | Traditional Chinese |
| Standard | CNS 11643 |
| Classification | ISO 2022, DBCS, CJK encoding |
| Encoding formats |
|
| Other related encoding(s) | Big5, CCCII |
CNS 11643 is designed to conform to ISO 2022. It contains 16 planes, so the maximum possible number of encodable characters is 16×94×94 = 141376. Planes 1 through 7 are defined by the standard; since 2007, planes 10 through 15 have also been defined by the standard.: 115–122 Prior to this, planes 12 to 15 (35344 code points) were specifically designated for user-defined characters. Unlike CCCII, the encoding of variant characters in CNS 11643 is not related.
EUC-TW is an encoded representation of CNS 11643 and ASCII in Extended Unix Code (EUC) form. Other encodings capable of representing certain CSIC planes include ISO-2022-CN (planes 1 and 2) and ISO-2022-CN-EXT (planes 1 through 7).