I’m trying to better understand OSM standards for various indoor elements.

Below, it would seem a corridor should be tagged as an area. I agree with this and this is how I’ve mapped many indoor corridors.

However, there are examples of a corridor being tagged as a line (or way); not as an area;

Below, another wiki entry states a corridor should ONLY be mapped using a line (or way) and should NOT be tagged as an area.

Some mappers don’t map a corridor at all, they simply create a foot path through a building and add a level=n tag.

Other mappers tag corridors thus:

Would it not be a good idea to have an OSM standard 1) for consistency and 2) so that new mappers aren’t confused?

Any opinions on this?