[Tagging] RFC ele:regional

[Marc Gemis]

>   2) Use ele:datum=unknown as a clue that the data is not that high
>   quality.

or make that the default, so that when there is no ele:datum data
consumers have to consider it as unknown .
Any ordinary mapper, including myself, just wants to put the number
they see on a sign into the database. Why do they need to add
ele:datum=unknown?
Let people that do know the datum (a much smaller group I assume) add
ele:datum explicitly.

regards

m.