I think that it is fine to repeat
Wikipedia link
(so probably also its Wikidata equivalent)
in some cases:
- streets with Wikipedia article
- structure that combines for example footway bridge and Weir- beach with
Wikipedia article split into parts
due to differing surfacesetc
8 Sep 2019, 19:26 by jan...@gmail.com:
> Has no one any opinion on this? I have a feeling this is important for the
> future of the Openstreetmap - Wikidata relationship..
>
> Janko
>
> On Fri, Sep 6, 2019, 15:05 Janko Mihelić <> jan...@gmail.com
> <mailto:jan...@gmail.com>> > wrote:
>
>> Last year there was a little discussion about unique wikidata ids in the
>> openstreetmap database:
>> https://lists.openstreetmap.org/pipermail/tagging/2018-August/038249.html
>> <https://lists.openstreetmap.org/pipermail/tagging/2018-August/038249.html>
>>
>> It was more or less decided there was no problem with this. Nevertheless, I
>> think we should consider having a hard rule of ">> A Wikidata item cannot be
>> connected to more than one OSM item>> ".
>>
>> Problems with not enforcing this rule:
>>
>> - the problem of a partially downloaded database, where one is never sure if
>> a wikidata item is fully downloaded unless the whole database is downloaded.
>>
>> - we could get a flood of wikidata tags where one would, for example, tag
>> every building in a town with the wikidata id of the town, because that
>> building is a part of the town. Is that wrong tagging? Well, if the above
>> rule is not in place, I'm not sure.
>>
>> - if a road segment has two road routes that are using it, then we should
>> tag it as "wikidata=Q1234;Q5678". That means, if we want to find any
>> wikidata id, we should be prepared to parse all wikidata tags and be
>> prepared for semicolons. This slows down any wikidata searches
>>
>> - we can't enforce some rules like "tag leisure=stadium can only be
>> connected to something that is, or is derived from Q483110 (Stadium) in
>> Wikidata" because, if we tag all the parts of an entity, we can also tag a
>> water fountain in the stadium, because that is a part of it.
>>
>> So I propose we enforce this rule, and we tag, for example, railways only on
>> the route relation.
>>
>> If one wants to tag all route segments with a wikidata tag, I propose a
>> general usage ">> part:wikidata=*>> " which would be used when a single
>> wikidata tag just isn't viable. Proposal wiki page here:
>>
>> https://wiki.openstreetmap.org/wiki/Proposed_features/part:wikidata
>> <https://wiki.openstreetmap.org/wiki/Proposed_features/part:wikidata>
>>
>> Thanks for reading,
>> Janko Mihelić
>>
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