[OSM-dev] Standard for Map Key

[Peter K]

Hi,

is there a kind of a standard or suggestion on how to retrieve the map
key? Like an http API or a leaflet plugin? On osm.org there is only the
'map key' data available for the default layer in the right box. And not
all details are given like here:
http://wiki.openstreetmap.org/wiki/DE:Map_Features

Someone knows some open source effort for more details and for support
of the various providers like mapquest, osm.de, cloudmade, ...?

Kind Regards,
Peter.