On Tue, Nov 28, 2017 at 11:02 PM, Christoph Hormann <o...@imagico.de> wrote:
> > * Wikidata is definitely not suited as an universal meta-database > > connecting OSM with other open data sets. This is because of the > > Notability concept > > (https://www.wikidata.org/wiki/Wikidata:Notability) which practically > > means the vast majority of the >500 million tagged features in OSM > > will never be able to get a Wikidata ID and will therefore never be > > able to be connected to other data sets through Wikidata. > I don't think this is a valid reason for avoiding linking to Wikidata. If Wikidata will not (or never?) have an item corresponding to an object mapped in OSM and that OSM-mapped object in turn has a corresponding item in another database, then we could conceivably link to that database directly from OSM via another tag. But I think this occurs only because that OSM-mapped object is only referenced in that one other database. In this case, I agree that linking to Wikidata provides not much value. However, once two or more other authoritative databases refer to the same object, then it already passes the Wikidata threshold for notability. In this case, it makes better sense to create the Wikidata item for that object, link the Wikidata item to the other databases by adding their identifiers, and then have OSM link to the Wikidata item instead of OSM linking to the other databases directly. Note that this database-linking is just one value-add that Wikidata provides. Wikidata by itself can also provide other data about the object itself and is not just a store for linking other data sets.
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