[Tagging] Terminology primary feature, main tag, etc..

[Martin Koppenhoefer]

sent from a phone

> On 3 Oct 2022, at 07:55, Mateusz Konieczny via Tagging <tagging at openstreetmap.org> wrote:
> 
> 
> - primary feature [1]
> - main key [2]
> - primary key [3]
> - feature tag [4]
> 
> 1) Are these synonyms (except for the key/tag distinction)?
> 
> 
> yes
> what about cases where multiple features are tagged on one object?
> For example stream + road tagged on one line?


2 primary features, identified by feature tags, represented by one OpenStreetMap element. Main key for stream is waterway, for road it is highway. In the osm2pgsql standard style, both are primary keys.

Cheers Martin
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