id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
11542	please add sanity checking for key:location  values	RicoZ	team	"Documented values are underground, underwater, overground, overhead, roof 

  http://wiki.openstreetmap.org/wiki/Key:location

Of those 5 I am not sure I would endorse location=roof but it is widely used and at least not completely wrong.

The list of used values in taginfo is currently 8181 items, many of them road names which were perhaps supposed to be addr or whatever else.

http://taginfo.openstreetmap.org/keys/?key=location#values"	defect	new	normal		Core