[Geocoding] Local level enumeration type vs. OSM conventions

[Bardo Nelgen]

Hi all,

with some huge buildings (like in this case a large Airport) a different 
type of level-counting (starts with 0 at OSM -1) is used by the 
operator, than is with OSM.

Which one am I supposed to use now?

The OSM conventions (and risk deployer-confusion on display) or the 
local one (putting proper OSM rendering at risk).

Or is there an agreed-upon way to satisfy both?

Thanks in advance for any input on the issue.

Best,

Bardo