http://lists.openstreetmap.org/pipermail/talk-de/2010-October/078359.html
User:Joto/How_to_invent_tags
http://wiki.openstreetmap.org/wiki/Category:Tagging_guidelines
http://forum.openstreetmap.org/viewtopic.php?pid=140894#p140894
Taginfo-WikiTag "manual": TagInfo/mw-extension-testing