John McConnell wrote:
The mapping of the HKSCS 2001 repertoire to ISO/IEC 10646-2:2001 has35 + 1651 + 511 + 2212 + 278 = 4687.
35 mapped to the private use area
1651 mapped to supplementary plane 2
511 mapped to the Extension A block (on the BMP)
2212 mapped to the CJK Ideographic block (also on the BMP)
plus another 278 mapped elsewhere on the BMP
HKSCS 1999 has 4,702 characters, and HKSCS 2001 adds 116, for a total of 4818. I believe the that 131 unaccounted for in your decomposition are in the "mapped elsewhere" pile, which should be 409.
Eric.