At 12:52 -0500 on 12/09/2015, Shmuel Metz (Seymour J.) wrote about
Re: Mime digests [was: IBM-MAIN Digest [snip]]:
In <7962980455281460.wa.paulgboulderaim....@listserv.ua.edu>, on
12/08/2015
at 06:53 PM, Paul Gilmartin
<0000000433f07816-dmarc-requ...@listserv.ua.edu> said:
>... but try following up to a message by R.S. or Skip Jo with base64
Unicode.
ITYM base64 UTF-8.
UNICODE and BASE64 are two different things.
BASE64 is/was a way of converting 8-bit code (ie: The codepoints from
x8F through xFF) into 7-Bit x00-x7F codes for transmission over 7-Bit
transmission paths.
UNICODE is a way of mapping more than 256 glyphs by using 16-bit codepoints.
US-ASCII is 7-bit (128 codepoints), ISO-8859-1 is 8-bit (256
Codepoints), while UNICODE is 16-Bit (65536 codepoints). Thus with
UNICODE you can have much more glyphs than is possible with
ISO-8859-1.
Note that UTF-8 is a way of mapping the 16-bit UNICODE Codepoints
into 8-bit codepoints similar to BASE64's mapping of 8-bit codepoints
into a set of 7-Bit codepoints.
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