Euro sign, ideographic zero, kana and extensions to the existing bopomofo and Roman alphabet support to plane 1. It introduced planes 10 through 14, containing additional hanzi, and incorporated the existing plane 15 extension into the standard itself (with gaps left where the characters already existed in planes 4 through 7). It also added 128 further hanzi to plane 3, starting at code point 68-40. , there are several thousand CNS 11643 characters with no corresponding Unicode character, mostly in planes 10 through 14; these are mapped to the Unicode Supplementary Private Use Area. Relationship to Big5 Levels 1 and 2 of the Big5 encoding correspond mostly to CNS 11643 planes 1 and 2, respectively, with occasional differences in order, and with two duplicate hanzi existing in Big5 but not in CNS 11643. They can be mapped using a list of ranges. However, the 213 classical radicals in CNS 11643 plane 1 are additional to the characters available in Big5, and further additional characters were added to CNS 11643 plane 1 in 2007. The Big5-2003 variant of Big5 is defined as a partial encoding of CNS 11643. Within the Big5 hanzi repertoire, only one character is conventionally mapped to Unicode differently from the corresponding character from the first two CNS 11643 planes: to U+5F5D (彝), whereas its CNS plane 1 counterpart is mapped to a related variant at U+5F5E (彞). However, some variant mappings for Big5, such as some defined by IBM, include U+5F5E rather than U+5F5D. References This page is based on the information on the CNS official web site. External links CNS 11643 official web site Current CNS 11643 open data, including mapping data Unicode Consortium mappings for CNS 11643-1986: planes 1 and 2, plus the 1988 plane 14 (not the 2007 plane 14) with extensions. Uses a single prefixed hex digit to indicate plane. CNS 11643 mappings from International Components for Unicode (ICU): "CNS-11643-1992": original version, current version. The original version of the mapping includes standard planes 1–7 but includes the plane 15 layout as plane 9; the current version includes only planes 1 and 2. Uses prefixed 0x81 through 0x89 to indicate plane. "EUC-TW-2014": standard assignments for planes 1 through 7 and 15, and IBM corporate assignments in planes 12 and 13. CNS codes in EUC format with two-byte plane 1. ISO-IR registered CNS-11643 code charts: plane 1, plane 2, plane 3, plane 4, plane 5,