Re: OnAgainOffAgain relations - beyond celeb marriage: Org membership

Agreeing with Dan here, you could argue that any instance of schema:Event
is also an example.

Taking Simon's example:
Bob - is captain of - Bowls Club - Jan 1, 2019–Dec 31, 2019
Bob - is captain of - Bowls Club - Jan 1, 2020–Dec 31, 2020

Seems equivalent to:

schema:Event
Bob's captaincy of Bowls Club 2019
startTime: Jan 1, 2019
endTime: Dec 31, 2019

schema:Event
Bob's captaincy of Bowls Club 2020
startTime: Jan 1, 2020
endTime: Dec 31, 2020

It seems natural to me that every triple should have start and end time
positions and possibly also a location position. The above examples seem to
me like different ways of saying the same thing, albeit the first has more
structure. You could argue that schema:Event is just a convenience type for
statements with temporal data.

YAGO knowledge base is a good example:
https://www.sciencedirect.com/science/article/pii/S0004370212000719

Regards
Anthony


On Fri, Dec 10, 2021 at 8:20 AM Cox, Simon (L&W, Clayton) <
Simon.Cox@csiro.au> wrote:

> Captain of the bowls club is another example.
>
> (I was in one of these the other day admiring the wooden honour boards –
> the same names come up repeatedly but not necessary sequentially.)
>
>
>
> *From:* Dan Brickley <danbri@google.com>
> *Sent:* Thursday, 9 December, 2021 22:57
> *To:* public-rdf-star@w3.org
> *Subject:* OnAgainOffAgain relations - beyond celeb marriage: Org
> membership
>
>
>
>
>
> The celebrity re-marriage example is interesting and real, but may look a
> bit artificial or cornercase. A similarly structured situation is much more
> common - membership of organizations.
>
>
>
> For example one organization being a member of another.
>
>
>
> https://www.wikidata.org/wiki/Q51698517 is the International Fact
> Checking Network (IFCN). It has a notion of membership grounded in review
> of members w.r.t. their official principles.
>
>
>
> Verified signatories are e.g. https://www.wikidata.org/wiki/Q30325238
> (Full Fact). There are some organizations such as Snopes (
> https://www.wikidata.org/wiki/Q2287154) who were once members (verified
> signatories) but who are not currently.
>
>
>
> Wikidata uses annotations on a https://www.wikidata.org/wiki/Property:P463
> edge between IFCN and Snopes to give start/end times (
>
> 15 April 2017, 5 June 2019). It also points to evidence/source document.
>
>
>
> As far as I know Snopes have only been members once, but if they were to
> rejoin it seems Wikidata could accomodate the task of representing this.
>
>
>
> Until I learn a better name for it that isn't too grandiose, I am calling
> these "on again, off again" relationships, in honour of the celebrity
> marriage/divorce usecase.
>
>
>
> Dan
>
>
>
> p.s. another example, not quite notable enough for Wikidata to record:
>
> I (https://www.wikidata.org/entity/Q56641640) have twice been a member of
> https://www.wikidata.org/wiki/Q7552326 (AISB - Society for the Study of
> Artificial Intelligence and Simulation of Behaviour).  But then I have
> multiple times lived in the U.K., or been in various restaurants; how do we
> scope RDF-Star's applicability? Which of these are reasonable places it
> could be used for time-scoped relationships?
>
>
>