[Tagging] part_of:wikidata key

Eugene Alvin Villar seav80 at gmail.com
Tue Nov 28 15:20:16 UTC 2017

On Tue, Nov 28, 2017 at 11:02 PM, Christoph Hormann <osm at 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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