This webseite shows extended information about the tags (Key - value pairs) which are used within the Map.
This includes the general description as well as some statistics about their usage.
A toplist comparing the 4 different countries with each other is available here.
|Area||OSM data from|
Site is generated with the planet.osm excerpt data from geofabrik.de.
See the OSMwiki page for more information about the Tagwatch script.