CJKV Information Processing, 2nd Edition

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Chapter 3: Character Set Standards

e history of CCCIITable 3-54.

Year Characters Description

1987 53,940 Volume III—combined and revision

1989 75,684 First variant revision draft

ANSI Z39.64-1989 (entitled East Asian Character Code For Bibliographic Use, or EACC as

an abbreviated form) is a derivative work of CCCII that contains a total of 15,686 char-

acters. Some consider EACC to eectively be an historical “snapshot” of CCCII, but it is

actually a fairly important precursor to the development of Unicode, and it is still exten-

sively used for bibliographic purposes.

While the structure of CCCII is something to be truly admired in that it establishes re-

lationships between characters, such as simplied and other variants, contemporary font

technologies—such as OpenType, which is covered in Chapter 6—provide the same level

of glyph substitution functionality at a level beyond encoding.

Unicode compatibility with Big Five and CNS standards

e most important characters in Big Five and CNS 11643 are included in Unicode. All

of Big Five Levels 1 and 2, along with CNS 11643-1986 Planes 1 and 2, are included in

the very early versions of Unicode. A small number of their non-hanzi do not yet map

directly to Unicode.

Table 3-42 listed the two hanzi in Big Five that are duplicately encoded. In order to main-

tain round-trip conversion capability, these two duplicate hanzi are mapped to ...