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<p><font size="+1">You guys squabbling make me feel young again ;-)</font></p>
<p><font size="+1">Note that commercial reference clocks are
themselves pretty far from ISO-8601, with settings for
IEEE-1344, etc.</font></p>
<p><font size="+1">Is there a persuasive argument for why IVOA
shouldn't mandate a binary timestamp standard? For that matter,
the FITS language is mostly driven by Y2K era ASCII keywords.
Nothing about FITS forbids encoding metadata into a binary table
structure (let alone VOtables). What would minimal best usage be
for timing metadata in a binary format? Could consensus be
reached if IVOA just ditched the grotty ASCII / UTF-8?<br>
</font></p>
<p>Rob</p>
<p>--<br>
</p>
<div class="moz-cite-prefix">On 1/11/19 12:30 PM, Arnold Rots wrote:<br>
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<blockquote type="cite"
cite="mid:CAJXToE_xWHfwnshCZVJ+z=CqnQVvVYaXi0Dn0MxrqgGBZkMTkQ@mail.gmail.com">
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<div dir="auto">And this is precisely the part of ISO 8601 that
does not make sense in astronomy: the exclusive choice between a
time zone and UTC. Hence, the community has accepted a limited
version of the ISO 8601 value string which is required to be
associated with a specification of the time coordinate frame
(including a time scale).
<div dir="auto">See FITS WCS Paper IV.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Cheers, </div>
<div dir="auto"><br>
</div>
<div dir="auto"> - Arnold </div>
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<br>
<div class="gmail_quote">
<div dir="ltr">On Thu, Jan 10, 2019, 17:11 Graham, Matthew J.
<<a href="mailto:mjg@caltech.edu" moz-do-not-send="true">mjg@caltech.edu</a>
wrote:<br>
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<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">The ISO 8601
spec is very clear: "The zone designator is
empty if use is made of local time
in accordance with 4.2.2.2 through 4.2.2.4,
it is the UTC designator [Z] if
use is made of UTC of day in
accordance with 4.2.4 and it is the
difference-component if use is made of
local time and the difference from UTC
in accordance with 4.2.5.2.” If you don’t use the
zone designator as in the standard then it’s not ISO 8601.<br>
<br>
— Matthew</blockquote>
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