[Tagging] Non proposed features

[Simone Saviolo]

> But how do we deal with the map features list, should they be managed?
> Managed by who? Managed by which guidelines?

If map features were really to be mantained as an official list of OSM
features, then they should be somehow enforced in applications. A sort
of "OSM certification" for consumers that support all of a subset of
tagging features.

>  regards
>  Matthias

Regards,

Simone