On Wed, Sep 14, 2016 at 2:01 PM, Jim Biard <jbiard at cicsnc.org> wrote:
> CF has consistently maintained adherence to the UDUNITS definition for the
> reference time string, and that is different from ISO. (See CF Section 4.4
> <http://cfconventions.org/cf-conventions/v1.6.0/cf-conventions.html#time-coordinate>)
> As stated at the top of the section, Z is not used in the case of UTC and
> there is a space before any time zone offset.fair enough.
>
Though as we move forward in versions, I think preferring an ISO standard
over "what UDUNITS happens to support" would be a good idea.
Example 4.4 is written that way specifically to make it clear that
> single-digit numbers are legal.
>
Hmm -- personally I think the examples should have recommended practice,
not allowable practice.
And see above ISO8601 should be recommended, even if not required.
But maybe that's just my opinion.
-CHB
> Grace and peace,
>
> Jim
>
> On 9/14/16 3:34 PM, Chris Barker wrote:
>
> I see in teh doc:
>
> Example 4.4. Time axis
>
> double time(time) ;
> time:long_name = "time" ;
> time:units = "days since 1990-1-1 0:0:0" ;
>
> IIUC, ISO 8601 requires two digits for the time pieces [1], so that should
> be:
>
> "days since 1990-1-1 00:00:00"
>
>
> The parser I use isn't picky about this, but maybe some are?
>
> BTW, as it's an example, we should probably throw a time offset on there,
> too:
>
> "days since 1990-1-1 00:00:00Z"
>
>
> or
>
> "days since 1990-1-1 00:00:00+00:00"
>
>
> [1] at least according to wikipedia: https://en.
> wikipedia.org/wiki/ISO_8601#Times
>
>
> -Chris
>
>
> --
>
> Christopher Barker, Ph.D.
> Oceanographer
>
> Emergency Response Division
> NOAA/NOS/OR&R (206) 526-6959 voice
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>
> Chris.Barker at noaa.gov
>
>
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--
Christopher Barker, Ph.D.
Oceanographer
Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception
Chris.Barker at noaa.gov
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Received on Thu Sep 15 2016 - 13:01:04 BST
