Mani walls and stones look like this (they are common in the Himalayas):
There are few of them mapped so far. There seem to be two approaches:
amenity=place_of_worship
name=mani wall
(see overpass turbo )
I think this is wrong, amenity=place_of_worship seems to be for thigs where people gather to do religious rites, which ot my knowledge manis are not (the religious practice there is more individual - but I am no religious expert, so might be wrong as well). Anyway, the name tag is misused.
Then there are
wayside_shrine=mani_wall or wayside_shrine=mani_field
combined with historic=wayside_shrine
( see wayside_shrine | Keys | OpenStreetMap Taginfo )
This is not mentioned in Tag:historic=wayside_shrine - OpenStreetMap Wiki
and wayside_shrine=* is undocumented: https://wiki.openstreetmap.org/wiki/Key:wayside_shrine. I think this approach is much better. However, I think they make sense to combine either with natural=stone natural=rock or barrier=wall as thery are also those. Also I think the value should be wayside_shrine=mani. Mani is the individual stone tabled with inscription (or the inscription itselft in case of boulders), if my understanding is correct.
Then threre are Stupas, the big ones have established way of mapping: Tag:man_made=stupa - OpenStreetMap Wiki
However, the wiki says:
- Do not tag
man_made=stupato a tiny stupa that resembles a sculpture (e.g. the 1-meter tall ones).
For that, there seems to be wayside_shrine=chorten with 234 uses (see above for taginfo). It is unfortunate it does not use the same word as stupa, even though chorten and stupa seem to mean the same thing (thugh the number seems to be low enough, with majority having been added by one user, that the name might be still changed?).
Now, how to proceed. I do not feel qualified to table a formal proposal for wayside_shrine. I however could make a partial proposal for wayside_shrine=stupa and wayside_shrine=mani, but I imagine there would be many voices calling for a proposal to cover all religions, which is beyond my knowledge.
But given these things are in use, I think documenting them on wiki and streamlining them (manly the abuse of the name tag) would be ok. Any comments?
(motivation: I have dozens of waypoints for mani walls that I made when I spent a month in Nepal, thinking there for sure is an established way of mapping them - however, it seems there is not)