CJK Compatibility Ideographs

CJK Compatibility Ideographs
RangeU+F900..U+FAFF
(512 code points)
PlaneBMP
ScriptsHan
Assigned472 code points
Unused40 reserved code points
Source standardsKS X 1001
Big5
IBM 32
JIS X 0213
ARIB STD-B24
KPS 10721-2000
Unicode version history
1.0.1 (1992)302 (+302)
3.2 (2002)361 (+59)
4.1 (2005)467 (+106)
5.2 (2009)470 (+3)
6.1 (2012)472 (+2)
Unicode documentation
Code chart ∣ Web page
Note: [1][2]
Range was initially part of the Private Use Area in Unicode 1.0.0,[3] and removed from it in Unicode 1.0.1.

CJK Compatibility Ideographs is a Unicode block created to contain mostly Han characters that were encoded in multiple locations in other established character encodings, in addition to their CJK Unified Ideographs assignments, in order to retain round-trip compatibility between Unicode and those encodings. However, it also contains 12 unified ideographs sourced from Japanese character sets from IBM.

The block has dozens of ideographic variation sequences registered in the Unicode Ideographic Variation Database (IVD).[4][5] These sequences specify the desired glyph variant for a given Unicode character.

  1. ^ "Unicode character database". The Unicode Standard. Retrieved 2023-07-26.
  2. ^ "Enumerated Versions of The Unicode Standard". The Unicode Standard. Retrieved 2023-07-26.
  3. ^ "3.5: Private Use Area" (PDF). The Unicode Standard, Version 1.0, Volume 1. Unicode Consortium. 1991. pp. 118–119. ISBN 0-201-56788-1.
  4. ^ "Ideographic Variation Database". Unicode Consortium.
  5. ^ "UTS #37, Unicode Ideographic Variation Database". Unicode Consortium.