Time format characters 'h' and 'k'
Philippe Verdy via CLDR-Users
cldr-users at unicode.org
Mon Aug 21 07:19:18 CDT 2017
But then why do you think that surrogates should have been allocated
elsewhere? If surrogates at been alocated at top, the low codepoints used
by ASCII would not be available for surrogates, and all code points would
be larger; UTF-8 may still place ASCII at top in the low position, but the
conversion between codepoint numeric values and UTF-8 would have been
So what I understand now is that for your "top" word, you meant F800..FFFF
("end" of the BMP: I do agree with that), but I had understood you meant
they should have been at "start" (at 0000..07FF) for an unexplained strange
reason. In common sense, "top" opposes to "bottom" and means the start, not
the end, and the charmaps published are also placing the start of planes at
top of charts, not the bottom (this also matches the normal reading order
in all modern scripts)...
2017-08-21 14:03 GMT+02:00 Mark Davis ☕️ <mark at macchiato.com>:
> And your reply "placing the surrogates at top would have avoided the
> emergence of UTF-8 with compatiblity with 7-bit US-ASCII" doesn't make
> sense to me.
> Having the surrogate zone at D800..DFFF vs F800..FFFF had no effect on the
> development of UTF-8.
> On Mon, Aug 21, 2017 at 12:00 PM, Philippe Verdy <verdy_p at wanadoo.fr>
>> 2017-08-20 16:13 GMT+02:00 Mark Davis ☕️ <mark at macchiato.com>:
>>> > placing the surrogates at top would have avoided the emergence of
>>> UTF-8 with compatiblity with 7-bit US-ASCII
>>> I don't see what you're talking about at all — and I was one of the
>>> people present at the times when all the decisions were being made.
>> I was replying explicitly to your own remark about the placement of
>> surrogates in the BMP. You suggested explicitly that it is an "historical
>> anomaly" and retrospectively think it should have been at top of it. I
>> included your own citation:
>> >> "As I recall, one of those historical anomalies (like the surrogate
>> range not being at the top of the BMP)."
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