[Tagging] Is tagging of fuel: assumed to be exhaustive?

[Niels Elgaard Larsen]

Matija Nalis:

> Hm, I do, but as it would be rather hard to prove (and such proof is not
> paramount here), lets us just agree that it is how certain amount of
> mappers use it (without trying to quantify it with subjective guesses).


I think it depend a lot from key to key.

> I think that my point remains that:
> - one method is clear and unambiguous ("fuel:lpg=no")
> - one method is not clear / is ambiguous ("fuel=octane_98;diesel").

Yes, but only because we have no way of denoting that lpg is not being sold in the 
second format and that you knew that lpg was not being sold when tagging it.

consider instead for example opening_hours.

The wiki is not very clear about whether it is exhaustive. I.e., if you for a 
facility tag:

   opening_hours=Mo-Fr 09:00-20:00

is it open on weekends, or is it not specified?


If I know that it is closed on weekends, I prefer to tag it:

   opening_hours=09:00-20:00; Sa-Su off

to avoid ambiguity.


For tags like cuisine and brewery it does not really make sense to have key:xxx=no 
values.


> So the first one should be preferred. Does that make sense?
> 

-- 
Niels Elgaard Larsen