I became aware of this #OvertureMaps PR¹ and you can tell that it seems they haven’t read “Falsehoods programmers believe about addresses”².

“All addresses have [...] street, number, [...] postcode.” Good luck recording addresses in Japan!

UPDATE! @jwass2000 (who opened the PR) and @ian (founder of #OpenAddresses) have replied saying that the address schema is intentionally simple at first but will eventually be more sophisticated.

Âą https://github.com/OvertureMaps/schema/pull/193

² https://www.mjt.me.uk/posts/falsehoods-programmers-believe-about-addresses/

Addresses by jwass · Pull Request #193 · OvertureMaps/schema

See initial PR #179 Addresses defines a point to describe a single address. All addresses have: country street number unit (optional) postcode Furthermore we need 3 "admin levels". Depending on t...

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To be fair, #OpenStreetMap’s way of tagging addresses is far from perfect, but I’d like to think that OSM mappers as a whole don’t have the hubris of thinking that there is a one-size-fits-all schema for addresses.
@seav The good thing with OpenStreetMap is you don't have to worry about a perfect tagging scheme because you'll always have three half-baked ones and a new draft from 2015 to choose from.