[Tagging] part_of:wikidata key

Frederik Ramm frederik at remote.org
Tue Nov 28 13:41:12 UTC 2017


On 28.11.2017 14:13, Andy Mabbett wrote:
>> the established rule not to have external IDs in the
>> OSM database
> What "established rule" would that be? Established by whom; when and how?

Let's say "established custom". Using a search engine of your choice,
you'll find things like

"neither project knows what the primary key of the
other is, and that makes everything more robust" (Andy A., 2009)

"External keys are always bad idea, unless they are wellknown values
like official public IDs." (Jaak L., 2013)

"While having external IDs (like GTFS stuff, TMC, Gemeindekennzahl,
etc.) in OSM is quite bad in principle, this particular ID is even worse
..." (Martin R., 2014)

It's certainly not an established *rule* since there are many objects
with GNIS IDs, or ref numbers left over from imports. (In most import
discussions it is suggested to drop these foreign IDs unless a clear use
case can be demonstrated.)


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