[Tagging] Adding floor location information

[Eugene Alvin Villar]

On 9/29/15, Martin Koppenhoefer <dieterdreist at gmail.com> wrote:
>> b) indicating floor level in the mall is useful, and looking at the wiki
>> shows that the tag addr:floor=* is suggested - but it only has 158 uses -
>> which is amazingly small. is this the right key to indicate what floor a
>> shop is on?
>
> addr:floor is about the address, "level" is used more often.

When addr:floor=* was first proposed a few years ago, it had almost
the exact same semantics as level=*.

Now, I'm using addr:floor=* to indicate the human-readable floor
information while level=* is used for the machine-readable number. For
example: addr:floor=Mezzanine Level and level=0.5