CJK Radicals Supplement is a Unicode block containing alternative, often positional, forms of the Kangxi radicals. They are used as headers in dictionary indices and other CJK ideograph collections organized by radical-stroke.
Block
History The following Unicode-related documents record the purpose and process of defining specific characters in the CJK Radicals Supplement block:
Version Count L2 ID WG2 ID IRG ID Document 3.0 U+2E80..2E99, 2E9B..2EF3 115 N1492 N407 N1432 N367 N1453 N429 N1486 N437 N1489 N1490 N436 doc) doc) N453 N454 N455 N1617 N480 N1603 N1732 N1923 html, doc) doc) doc) N2003 N2065 N2121 N2122 N2103 N5122 N5069R
References