Chinese Character Code for Information Interchange

The Chinese Character Code for Information Interchange ( CCCII, Chinese中文 资讯 交换 码to German about Chinesisischer characters Code for Information Interchange ) is a Chinese character set ISO -2022 compliant.

The character set is a mixed 8 - and 24 -bit character set. The first 128 code points are encoded in 8 bits and correspond to ASCII. The following 128 code points are in 24-bit encoded in a three-dimensional 94 × 94 × 94 matrix, so theoretically 830 584 characters can be encoded.

This area is divided into 15 so-called layers. Although these layers encode all the same Chinese characters, but in different versions. So encoded layer 1 long mark, layer 2 Designation, layer 13 and layer 14 Kanji Hanja. The intermediate layers are used for other variants, while layer 15 is reserved.

Due to its characteristics, the character set is very commonly used by libraries, as used, for example, the Library of Congress CCCII (East Asia Coded Character, EACC, ANSI / NISO Z39.64 ).