please do not use old amenity=swimming_pool
- it should be leisure=

see osm.wiki/Tag:amenity%3Dswimming_pool

thanks, Alex

why you use building=ja instead of =yes ?? OSM tags should be english!

Ok, you are right. I was not aware.
I just checked: 8561 wikipedia using "_",
vs. 360216 having " ".

there is only 1 official name (e.g. Ortseingangsschild) which is typically in local language.

please do not remove the name-tag !
many tools require this and it is used worldwide!
the official name is name,
translations use name:lang,
osm.wiki/Key:name

please follow:
osm.wiki/Key:wikipedia#Examples

please follow:
osm.wiki/Key:wikipedia#Examples

please follow the format from osm-wiki:
osm.wiki/Key:wikipedia#Examples
do not forget value="en:Name"

rules accoring to osm-wiki:
osm.wiki/Tag:tourism%3Dhotel

found/detected via:
https://taginfo.openstreetmap.org/tags/amenity=hotel

Please check now:
osm.wiki/Tag:aeroway%3Daerodrome#Useful_Combination

It is also used in Wikipedia for most Airports, e.g.:
https://en.wikipedia.org/wiki/Berlin_Tegel_Airport

type is only for relation type, see:
osm.wiki/Key:type

so I used the Proposed_features to correct the wrong usage.
osm.wiki/Proposed_features/Aerodrome#type.3D.2A_still_has_some_.28historic.29_traction

OK

I agree.

ok fine. I only fixed the format thing.
wikipedia=Name, not wikipedia=en:Name,

PS: I also kept note=accomodation to be understood later. Perhaps a fixme would be needed?

I'm sotrry for this. But last time it was different: I used JOSM to cahnge >1000x e.g. type=Private to type=private and it was complained about that some other untouched tags were obviuosly wrong but overseen by the change.
But OSM has a general problem for beeing understood by tools (e.g. renderers). some call it "restaurant", some "restrant", some "Meyers Restaurant", some "Restaurant", or even "Beaitufull restaurant", etc.
We need to find a way to unify these different writings. Only special key=value-pairs have a real meaning.

you are right. first I tried to reduce different writings for similar things (e.g. typos, x-N , old-N disused:N, N:disused, N-closed). But perhaps it would be better to directly bring it into final state and skip the middle-step.

taginfo is a great help for it..
https://taginfo.openstreetmap.org/keys/amenity#values

hi SE, the problem is "accomodation" is an undefined value (see osm.wiki/Key:tourism ) and the old value was used world-wide only about 10 times.
To make the map more usable, I think it is a good idea to convert it to guest_house.
From psycological point of view: a Hotel is typically mapped as hotel, but Accom.. is used for smaller stuff. Before these sleeping-places were invisible to the renderer and other applications.
Can you agree to this?

the wikipedia link is broken