OK, I did not think it might confuse users, the label needs to be changed. It's of course not intended to use in statements which have no value, it's just an attempt to express wikibase data model in Wikidata. https://www.wikidata.org/wiki/Q16354757 is not Wikibase Data model :)
I changed the label to ensure users would not confuse the items with the real values ... 2015-04-22 21:52 GMT+02:00 Markus Krötzsch <mar...@semantic-mediawiki.org>: > 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 >
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