[Tagging] tunnel=building_passage or covered=yes

[Richard]

On Sat, Sep 10, 2016 at 12:09:56PM +0100, Dave F wrote:
> Hmm...
> The building_passage tag (65 445) is a new one to me.
> http://taginfo.openstreetmap.org/tags/tunnel=building_passage
> 
> Looking at the wiki it's very similar to covered=yes (254 624)
> http://taginfo.openstreetmap.org/keys/covered
> 
> I thought there was a discussion here where it was agreed to be a tunnel it
> would need to be below natural ground (ie a mountain or river bed).
> These 'building_passage' all appear to be at ground level.

old discussions mention it should have been covered=building_passage 
but because back when it was introduced there was a greater chance 
to get tunnel=building_passage rendered tunnel was used instead.

So it remains as a slightly odd exception to tunnel=* and covered=*

Richard