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The FAQ states "As such all addr:* tags (except addr:street) are ignored" which appears not to be true, addr:housenumber is searchable so it must be indexed. If both addr:street and addr:housenumber are parsed and indexed then why not addr:postcode? The performance impact of reading on more attribute when you're already inspecting the building objects should be negligible. Postcodes in the UK aren't given at a street level, two different sides of the same section of street can have different codes --GBee 20:42, 29 April 2011 (BST)

It's also implied that postal_code will be inherited from the street but this doesn't appear to be true either, if I search by postcode only FreeThePostcode results are returned.--GBee 10:25, 30 April 2011 (BST)

addr:* tags on buildings

AFAIK Nominatim DOES index addr:* tags on building, e.g. houseumbers. Can we delete that chapter?--Geogast (talk) 10:28, 8 August 2013 (UTC)

How to output place_id with GEOJSON?

This link is not working as expected

Why do you think this should work? According to the documentation, only and support polygon_geojson=1 as a parameter. You've added that parameter to the details.php url. Mmd (talk) 11:16, 17 June 2017 (UTC)
Hi @Mmd, thanks (!). There are a way (API) to request GEOJSON of a place_id? --Krauss (talk) 17:54, 17 June 2017 (UTC)
Let's take a step back first. Are you aware that the place_id has absolutely no relevance for OSM? It is just an internal Nominatim identifier, and it changes across Nominatim instances. So don't rely on that number. Please also take a look at the documentation [1]. Are you doing reverse geocoding, or maybe something else? Mmd (talk) 18:01, 17 June 2017 (UTC)