Characters of code 0x0..0x10FFFF are Unicode characters of the same code points.
Characters of code 0x3FFF80..0x3FFFFF are raw 8-bit bytes.
++++
Generic characters no longer exist.
In buffers and strings, characters are represented by UTF-8 byte
to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets
unicode, iso-8859-1, iso-8859-3, etc).
+*** The functions `split-char' and `make-char' now accept up to 4
+positional codes instead of just 2.
+
*** The functions `encode-char' and `decode-char' now accept any character sets.
*** The function `define-charset' now accepts a completely different