[Tagging] Feature Proposal - RFC - Wikidata

Janko Mihelić janjko at gmail.com
Thu Apr 3 00:23:20 UTC 2014

I think our own wikibase could be used to give a more structured semantic
meaning of tags, and combinations of tags.

For example, we want to define what a McDonalds restaurant is in our
database. Is it a node with name=McDonalds? Well, a parking lot could be
named the same. Is it a way with amenity=fastfood + name=McDonalds? Well,
in China they are called differently. Is it a relation, node or way with
franchise:wikidata=Q38076? What combination of tags is enough to be sure
that something is a McDonalds restaurant? We have to define that somewhere.

Well, this wikibase would be a database of all these combinations that can
be considered to have a specific meaning. Then those items could be
connected with Wikidata or other databases. Also, dataminers would have a
reliable place with defined queries for their needs.

But this is a bit offtopic.


2014-04-03 1:37 GMT+02:00 Jo <winfixit at gmail.com>:

> I'm afraid I don't fully understand the reasoning behind OSM having its
> own wikidata DB. What extra (different) data would we store in it, which
> couldn't go in Wikidata? I understand it in the case of Commons to store
> metadata like diaphragma and lenses used when taking those pictures.
> Oh, maybe we can store source and other metadata in it?.. But we're
> already storing our data in a DB, aren't we?
> Polyglot
> 2014-04-02 23:34 GMT+02:00 Janko Mihelić <janjko at gmail.com>:
>> 2014-04-02 16:56 GMT+02:00 Andy Mabbett <andy at pigsonthewing.org.uk>:
>>> There is also the case of sets;  for example, four carvings which form
>>> a single artwork, but which are mapped as separate entities.
>> You could put the four carvings into a relation, and put the wikidata tag
>> there (along with the name=* and tourism=artwork). Or you could create four
>> wikidata items, and give them the attribute "part of" and connect with the
>> first item. Then reference those four items in OSM.
>> 2014-04-02 19:13 GMT+02:00 Andy Mabbett <andy at pigsonthewing.org.uk>:
>>> One might also reasonably expect to find multiple instances of things
>>> like material:wikidata=Q23757 (that's limestone).
>> I wasn't talking about xxx:wikidata=* tags. There can be lots of those.
>> All sculptures by one artist should have the same artist:wikidata=* tag.
>> All streets named after Nikola Tesla should havename:etymology:wikidata=Q9036. But there should be only one element with
>> wikidata=Q384, or any other number.
>> P.S. I'm not sure we should reference materials from Wikidata. That's
>> going a bit too far. Tagging material=limestone should be enough. If we
>> want to go that far with connecting OSM tags with Wikidata, there are
>> better ways. I have thought about this, and with common tags like
>> material=* we could make our own Wikibase installation, and connect tag
>> combinations from OSM with Wikidata items.
>> Janko
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