Note that in Wikidata we are developping methods and tools to class items in « classes », which in short are sets of real world things or events. In languages like the w3c language and standards OWL2 <https://en.wikipedia.org/wiki/OWL2>. In this language you can assign a class to an element (a media in the common case) to a class (that can be seen as a better defined category) either by creating a statement « this media belongs to that category » (in Wikidata this is done by using the « instance of » property <https://www.wikidata.org/wiki/Property:P31>) or by associating a so called «class expression» in OWL (an analog of a query but more powerful) Then in OWL any item who satisfy the criteria of the query or class expression associated to a class belongs to that class without stating it explicitely. In short, the possibility to assign an arbitrary class to an item when a query is not enough will also be possible with just a metadata repository, we may in the future even be able to mix these two ways to class medias.
2014-08-19 10:14 GMT+02:00 James Heald <[email protected]>: > Also there might be queries one might want to run on the categories, which > would be another reason to include them in Commons Wikibase. > > -- J. > > > > On 19/08/2014 07:00, Gerard Meijssen wrote: > >> Hoi, >> I know the categories in Commons exist. I also know that you do not have >> to >> add categories when an image is uploaded. Many people do not consider the >> categories because they are just there and are not easy nor obvious >> without >> a long study. >> >> They are there and they evolve. When the "community" finds that they are >> no >> longer useful, there will be others who still want to work on it. They >> can, >> it is a harmless occupation. Why would we consider removing category >> structures as long as someone cares about them ?? >> Thanks, >> GerardM >> >> > > _______________________________________________ > Wikidata-l mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata-l >
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