You should read the helpages Gerard sometimes :) This is on the Wikidata plan since the beginning, it is usable since the beginning, and it will be queryable ... I really don't understand what bothers you.
2015-04-23 12:12 GMT+02:00 Gerard Meijssen <gerard.meijs...@gmail.com>: > Hoi, > For me it is obvious ... this search for perfection is an enemy of what is > good in Wikidata. It destroys the results of queries. It is not usable and > it is only of use in a very small percentage of cases. > > Compare it with the "female mayor" question. Our issue is that we have not > enough data in the first place and we should concentrate on making things > easier to comprehend not weigh it down with the balast of discussions > elsewhere. > Thanks, > GerardM > > On 23 April 2015 at 11:56, Thomas Douillard <thomas.douill...@gmail.com> > wrote: > >> In wikidata, the absence of a claim about something cannot mean the claim >> has no couterpart in reality, as Wikidata is an will always be incomplete. >> >> For example if we have a series, maybe finished, maybe unfinished, we wil >> have claims that says: >> >> Episode 2 follows Episode 1 >> Episode 3 follows Episode 2 >> ... >> >> If for some reason we're sure that the series is other, we can state >> no value follows Episode 2 >> >> Which means "We're sure the series is other". >> >> Otherwise this means "Wikidata do not know", for some reason there could >> be a following episode but noone updated Wikidata yet, for example. >> >> 2015-04-23 11:33 GMT+02:00 Gerard Meijssen <gerard.meijs...@gmail.com>: >> >>> Hoi, >>> Sorry for being dense.. What is wrong with there being no value ? Having >>> a "no value" is imho understanding only a complication of saying nothing... >>> Why not say nothing in the first place ? >>> Thanks, >>> GerardM >>> >>> On 22 April 2015 at 21:52, Markus Krötzsch < >>> mar...@semantic-mediawiki.org> wrote: >>> >>>> Hi Thomas, >>>> >>>> On 22.04.2015 20:06, Thomas Douillard wrote: >>>> >>>>> Hi, there is items about Wikibase data model in Wikidata (created by >>>>> me, >>>>> but not only) >>>>> >>>>> If I understand correctly, they could be cited in the semantic web as >>>>> https://www.wikidata.org/entity/Q19798647 >>>>> >>>> >>>> "No value" is exactly that: not a value. It should not be confused with >>>> a (definite) value that is used with claims (as the item description seems >>>> to suggest). The reason why we introduced "no value" was to be able to say >>>> this without resorting to a "special value" to represent this. >>>> >>>> You can also find some rationale about this in our article "Wikidata: a >>>> free collaborative knowledgebase" (see >>>> https://ddll.inf.tu-dresden.de/web/Article4002/en). Basically, the >>>> main point is that, if you are querying for two people with a common child, >>>> you wouldn't want to get pairs of people who both have "novalue" as a value >>>> for "child". The same is true for "some value" (sometimes referred to as >>>> "unknown value") -- again, if this would be a definite "special" value, and >>>> be treated like a value in queries, it would lead to wrong results. >>>> >>>> Cheers, >>>> >>>> Markus >>>> >>>> >>>>> (If they are kept /o\) >>>>> >>>>> Tom² >>>>> >>>>> >>>>> _______________________________________________ >>>>> Wikidata-l mailing list >>>>> Wikidata-l@lists.wikimedia.org >>>>> https://lists.wikimedia.org/mailman/listinfo/wikidata-l >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> Wikidata-l mailing list >>>> Wikidata-l@lists.wikimedia.org >>>> https://lists.wikimedia.org/mailman/listinfo/wikidata-l >>>> >>> >>> >>> _______________________________________________ >>> Wikidata-l mailing list >>> Wikidata-l@lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/wikidata-l >>> >>> >> >> _______________________________________________ >> Wikidata-l mailing list >> Wikidata-l@lists.wikimedia.org >> https://lists.wikimedia.org/mailman/listinfo/wikidata-l >> >> > > _______________________________________________ > Wikidata-l mailing list > Wikidata-l@lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/wikidata-l > >
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