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Re: [Minutes] 2016-02-03

From: Frans Knibbe <frans.knibbe@geodan.nl>
Date: Fri, 18 Mar 2016 14:31:23 +0100
Message-ID: <CAFVDz40YHJHbrLZsUFLu-2ds6j5HxwRNQv-XpjZrrG9nME-Cmw@mail.gmail.com>
To: "Little, Chris" <chris.little@metoffice.gov.uk>, Simon Cox <Simon.Cox@csiro.au>
Cc: Alejandro Llaves <allaves@fi.upm.es>, SDW WG Public List <public-sdw-wg@w3.org>
Hello Chris, Simon,

Chris's comment on issue 15 seems important, that is why I would like to
ask for Simon's thoughts before I change the UCR document. There is problem
with expressing that "a web resource is in the past, present or future with
respect to another web resource". But is the problem that it is currently
not possible with OWL Time? Or is the problem that it is difficult to use
because of sparse documentation, lack of examples and/or the spec being to
abstract and mathematical? We could introduce a new requirement anyway, but
the way it is phrased should depend on the answer of that question. And I
would not want to insinuate that something is not possible with OWL Time
while in fact it is.

As for issue 26, it seems the August 2020 example is inappropriate, since
it can be expressed as xsd:gYearMonth. So I think we should not mention
that example.

Thanks,
Frans

2016-03-02 18:08 GMT+01:00 Little, Chris <chris.little@metoffice.gov.uk>:

> Hello Frans,
>
>
>
> I think your précis of the issues is spot-on.
>
>
>
> Issue 26
>
> I can only add to the last example that “August 2020” can be expressed in
> ISO8601, as the standard allows truncation from the right, but not the left
> (I.e 2020-08 is valid, but 12-25 for an unknown Christmas Day is not.) I am
> not sure about XSD without rummaging around.
>
>
>
> For Issue 15, I would like to see some concrete examples as to how one
> would use the existing OWL Time to relate some resources, in whatever
> syntax is appropriate. At present, it is rather abstract and mathematical
> in my head.
>
>
>
> Chris
>
>
>
> *From:* Frans Knibbe [mailto:frans.knibbe@geodan.nl]
> *Sent:* Thursday, February 18, 2016 11:04 AM
> *To:* Little, Chris
> *Cc:* Alejandro Llaves; SDW WG Public List
> *Subject:* Re: [Minutes] 2016-02-03
>
>
>
> Hello Chris,
>
>
>
> Thank you for taking action. We should now look into if and how resolving
> the issues leads to changes to the UCR doc.
>
>
>
> We are facing the following decisions:
>
>
>
> On issue-15 <https://www.w3.org/2015/spatial/track/issues/15>. A new
> requirement for the OWL Time deliverable will be added to the UCR document:
> "*It should be possible to declare that a web resource is in the past,
> present or future with respect to another web resource*".  Does this make
> sense in light of OWL Time already supporting this functionality (see the
> last messages in this e-mail thread
> <https://lists.w3.org/Archives/Public/public-sdw-wg/2015Aug/0003.html>)?
>
>
>
> On issue-26 <https://www.w3.org/2015/spatial/track/issues/26>. It seems
> we should keep the basic requirement as it is ("*It should be possible to
> describe time points and intervals in a vague, imprecise manner.*"). A
> more extensive list of examples should be supplied to illustrate what we
> mean by that. Examples to list are:
>
>    - An event happend at the second quarter of the 9th century (the
>    calendar used for this fact is unknown)
>    - Something occured in the afternoon of july 1st, 2011 (the time
>    interval 'afternoon' is not precisely defined)
>    - A photo is known to be taken on a Christmas day, but the year is
>    unknown.
>    - An event took place in the later part of the Jurassic (with 'later
>    part' being imprecise, as opposed to 'Late Jurassic')
>    - Something is known to take place somewhere in August 2020 (only year
>    and month are known, which is difficult to express in ISO-8601 or standard
>    XSD datatypes)
>
> Do you agree with the requirement and the examples?
>
>
>
> Regards,
>
> Frans
>
>
>
>
>
>
>
> 2016-02-04 13:34 GMT+01:00 Little, Chris <chris.little@metoffice.gov.uk>:
>
> Dear Frans and Alejandro
>
> I noticed that two issues against my name were still open:
>
> Issue-15 Time req. not clear - represent past, present and future
> Issue-26 Clarification of temporal vagueness
>
> Last year, you kindly led us into some extended discussion and clarified
> the requirements into something more substantial.
>
> I tried to summarise the outcomes in the tracker Notes (it took me a while
> to remember how to do things).
>
> I have now put both Issues into Pending review. Do you, or anyone else,
> have any objection to closing them?
>
> The only outstanding item from the threads was for me to add some
> terminology and definition to the Glossary, which I will do, as we agreed
> the terminology was diverse and potentially confusing.
>
> Best wishes, Chris
>
>
>
Received on Friday, 18 March 2016 13:31:53 UTC

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