For what it's worth, I think your proposal makes sense. Polyglot
On Sun, Sep 8, 2019 at 6:28 PM Janko Mihelić <jan...@gmail.com> wrote: > 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> 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 >> >> 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 >> >> Thanks for reading, >> Janko Mihelić >> > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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