[Tagging] 'Unknown' value.

[Andy Townsend]

On 03/02/2018 22:16, Nelson A. de Oliveira wrote:
> foot=unknown in England

I've added a few of those - mostly they're places where there is 
physical access, but it's really not clear what the access rights (if 
any) are.  There's no signage suggesting legal access, no infrastructure 
suggesting planned or tolerated access, and most importantly nothing 
suggesting that further survey will reveal what the legal situation is - 
what normally happens is that some time later (months or years) it gets 
signed as either legally accessible or inaccessible.

Like with any tag value, if data consumers don't undestand it they can 
just ignore it.

Best Regards,
Andy