[Tagging] Deprecating wikipedia Tag

[moltonel 3x Combo]

On 25/05/2015, Andy Mabbett <andy at pigsonthewing.org.uk> wrote:
> "On 25 May 2015 at 22:18, moltonel 3x Combo <moltonel at gmail.com> wrote:
>
>> How do you link to a wikidata label in an OSM tag ? One that never
>> suffers from renaming ? As far as I know, we can/should only use
>> wikidata ids, which are stable but not user friendly.
>
> http://wiki.openstreetmap.org/wiki/Proposed_features/Wikidata

I see nothing there that enables using a wikidata label in an OSM tag.
The only reference to labels is a javascript library that does the API
calls for you, which is a completely different usecase.


>> I had also mentioned rename issues. Why leave that sentense out of the
>> quote and then restate it ?
>
> You wrote "using the wikipedia tag is much more straightforward than
> using the wikidata tag (leaving the language and renames issues to
> more meticulous data consumers)"; my point apllies to all reusesrs,
> bnit just the "more meticulous".

We agree, just a misunderstanding on the wording. All users of the
wikipedia tag will have issues with renames. The more meticulous
consumers will use the wikidata tag instead, which avoids rename
issues.


>> Which is why we should keep wikipedia tags (along with the
>> human-friendly IDs).
>
> But as already shown, Wikipedia tags have a higher-rate of link rot.

Yes. I'm not saying that wikipedia tags are better. Just that we need
to keep them, for better or worse.


>> And when both wikipedia and wikidata tags are
>> present, we can QA that they are in sync (just like we currently QA
>> that website an wikipedia are not 404).
>
> Who will do that QA?

I know Keepright does, and I'd be surprised if Osmose doesn't.


>> Speaking of stable ids, how does wikidata handle renames,
>
> Links from the Wikidata item are updated.

Ok, I assumed as much.

>> merges and splits on the wikipedia side ?
>
> New bridging items are created.

Interesting. Where can I find examples and doc ?

>> Even in the best-case scenario, it
>> seems that an OSM wikidata tag can drift off-target following
>> reorganisations that are correct from a wikimedia POV but not from an
>> OSM POV.
>
> Example?

An hypothetical example: a hotel that includes a restaurant. OSM uses
two objects from the begining, both linked to the single wikidata
article that talks about the hotel as a whole. The restaurant later
gets spun off as an independent business and get its own wikidata item
(either a split or a new one), but OSM still links to the "hotel as a
whole" wikidata item.

Does wikidata have some tricks up its sleeve to reliably deal with
that kind of problem ?