On Tue, 24 Aug 2021, Arnaud Quette wrote:
Le ven. 20 août 2021 à 17:38, Roger Price <ro...@rogerprice.org> a écrit :
On Fri, 20 Aug 2021, Jim Klimov via Nut-upsuser wrote:
> It is a bit unclear what "or otherwise and Combined date and time
> representations" means. An example of ISO 8601 date representation (one
of
> many offered by the standard) "or otherwise"? Which combined date and
time
> would we take - e.g. YYYYMMDDTHHMMSSZ (literal T separator and Z for
"zulu"
> UTC timezone)? Or with dashes and colons? Or...?
Since we are concerned only with dates, and not time of day, things are a
little
simpler. We follow ISO 8601 clause 5.2.1 Calendar dates, and we don't
have to
worry about timezones. The only real choice is between the format
YYYYMMDD and
YYYY-MM-DD. Since our dates are intended primarily for humans it seems
better
to use the format YYYY-MM-DD which has better readability. It's always
possible
to extract the YYYYMMDD number if this is eventually needed.
Roger
See also RFC 3339 "Date and Time on the Internet: Timestamps"
Hi guys,
sorry, I completely missed your mail answers, and only focused on the PR
comments.
So thanks for your feedback.
My original intent was only focused on the battery.date{,.maintenance}.
However, I thought to myself that it could be broadened to all .date
(including ups*). As mentioned, it's an option. Opaque string format still
applies, and *if possible*, ISO 8601 Calendar date should be used.
As for the time, I'm still in between: for the base date variables, it's only
date without time. There is even a ups.time to track the device clock. So even
if I amended the PR to include a variation of <date>T<time>, I can revert it
if you prefer.
I had forgotten about ups.time. Should date and time in NUT be exclusively
opaque, human-readable? Perhaps the safest strategy for the long term is to
follow RFC 3339. This has advantages over ISO 8601:
* Available without charge to everybody.
* Includes in appendix A grammars for date, time, duration and period.
Roger
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