CJK Unified Ideographs Extension B

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CJK Unified Ideographs Extension B
Range U+20000..U+2A6DF
(42720 code points)
Plane SIP
Scripts Han
Assigned 42711 code points
Unused 9 reserved code points
Unicode version history
3.1 42711 (+42711)
Note: [1]

CJK Unified Ideographs Extension B is a Unicode block containing rare and historic CJK ideographs for Chinese, Japanese, Korean, and Vietnamese.

The block has dozens of variation sequences defined for standardized variants.[2]

It also has thousands of ideographic variation sequences registered in the Unicode Ideographic Variation Database (IVD).[3][4] These sequences specify the desired glyph variant for a given Unicode character.

See also[edit]


  1. ^ "Unicode character database". The Unicode Standard. Retrieved 22 March 2013. 
  2. ^ "Unicode Character Database: Standardized Variation Sequences". The Unicode Consortium. 
  3. ^ "Ideographic Variation Database". Unicode Consortium. 
  4. ^ "UTS #37, Unicode Ideographic Variation Database". Unicode Consortium.