Re: Some background on Extended Date Time Format (EDTF) (was: ISSUE 14: temporal reasoning and relations)

Thanks Lars.  ( Btw my email to you seems to always bounce after a few days of delay, but this should be visible to you via the public list, at least).

Ray, thank you for your kind offer to join us and to present on EDTF.
 The meeting will be conducted via webex and irc. You can see the how-to here.  https://www.w3.org/2015/spatial/wiki/Meetings#Dial_in_details 
Note that on the coming Wednesday we will have a 2hour meeting, commencing an hour earlier than usual, and there will be a bunch of people meeting in person in Keyworth (Nottingham) UK.   The agenda for the meeting, is posted to this     https://lists.w3.org/Archives/Public/public-sdw-wg/  list at least 24 hours  ahead.

Kerry



> On 11 Sep 2015, at 9:23 pm, "Svensson, Lars" <L.Svensson@dnb.de> wrote:
> 
> Kerry,
> 
> I didn't get a formal action for this, but Ray is prepared to give a ten minute WebEx presentation on EDTF on Wednesday next week. Is there a specific process for inviting him to the online meeting?
> 
> Regarding the timing of his presentation I think it's easier for you to clarify that bilaterally.
> 
> Best,
> 
> Lars
> 
> *** Lesen. Hören. Wissen. Deutsche Nationalbibliothek *** 
> -- 
> Dr. Lars G. Svensson
> Deutsche Nationalbibliothek
> Informationsinfrastruktur und Bestanderhaltung
> Adickesallee 1
> D-60322 Frankfurt am Main
> Telefon: +49-69-1525-1752
> Telefax: +49-69-1525-1799
> mailto:l.svensson@dnb.de 
> http://www.dnb.de
> 
> 
>> -----Original Message-----
>> From: Svensson, Lars
>> Sent: Tuesday, September 08, 2015 9:24 PM
>> To: public-sdw-wg@w3.org
>> Cc: Denenberg, Ray <rden@LOC.GOV> (rden@LOC.GOV)
>> Subject: Some background on Extended Date Time Format (EDTF) (was:
>> ISSUE 14: temporal reasoning and relations)
>> 
>> All,
>> 
>> On Wednesday, August 12, 2015 4:58 PM, Karl Grossner wrote:
>> 
>> [...]
>>> **************
>>> Further support for uncertain temporal expressions-- Contributed by Karl
>>> Grossner <https://kgeographer.org> 2015-08-11
>>> 
>>> OWL-Time does support some uncertain expressions by means of interval
>>> relations accounting for "before," "after," (sometime) "during," etc. It
>>> does not allow for approximate and vague expressions such as "circa 560
>>> CE" or "sometime in the early 1920's." These could be covered in two ways:
>>> 
>>> 1. by allowing a '~' operator to accompany any ISO-8601 expression
>>> 
>>> 2. by allowing the hasBeginning and hasEnd elements to be specified by
>>> intervals as well as by instants
>>> 
>>> e.g. the object of a hasEnd property could be an interval having
>>> earliestEnd and latestEnd properties
>>> A number of further OWL-Time extensions, such as adding an "uncertain"
>>> operator ('?') to '~', for an entire ISO-8601 expression or parts thereof,
>>> are proposed in the fairly recent US Library of Congress document,
>>> **"Extended Date/Time Format (EDTF) 1.0”**
>>> <http://www.loc.gov/standards/datetime/pre-submission.html>
>> 
>> I've been in touch with Ray Denenberg from the Library of Congress (in cc)
>> who is the primary editor of EDTF. He gave me some valuable background
>> information on the document and allowed me to share that with the WG.
>> 
>> EDTF was developed on the request of Rebecca Guenther from the Library of
>> Congress (LoC) who wanted a date/time format more friendly to library
>> requirements. After the spec was published in its current form (2012-01-13) it
>> was submitted to the W3C as a member submission (LoC is a W3C member)
>> with the primary goal to make EDTF become a primitive data type (e. g.
>> xs:edtf). The W3C rejected it as out of scope.
>> 
>> Ray then approached ISO and after quite some time he got the attention of
>> TC154 where ISO 8601 resides. Timing was good, because they recently
>> convened a working group for "8601 part 2", essentially extensions to 8601.
>> Ray is on that group and on their conference calls much of the discussion has
>> been about EDTF. The group seems to be willing to incorporate most or all of
>> EDTF into 8601 part 2. Ray would want EDTF to be a profile of 8601 (he has
>> introduced the notion of "profile" into the discussion) and that only works if
>> the features of EDTF are all in 8601. A first draft of 8601 part 2 should be
>> available in March 2016.
>> 
>> Ray is definitely willing to work with us to see that the SDWWG requirements
>> are reflected in EDTF and he also suggests that someone from the group gets
>> involved in the TC154 work.
>> 
>> My suggestion is that we invite Ray to one of the Wednesday telcos where
>> he can present EDTF to the group. As Ray, I find it a bit astonishing that the
>> W3C turned down the member submission (but I'm sure they had their
>> reasons for it). If we decide that EDTF can solve some of our requirements, I
>> think we should help to move the document forward (and if we want to use
>> the format on the web, we definitely need a datatype).
>> 
>> Perhaps we can find a few minutes to talk about this tomorrow.
>> 
>> Best,
>> 
>> Lars