I suggest this should just redirect to Key:addr these days. The see also links mention place_numbers which are no longer mentioned on the linked page, and an abandoned proposal. As Potlatch and JOSM support Karlsruhe tags I don't think there is much discussion on how to tag the common situations covered by Karlsruhe.
Note: This page also has a Spanish version, so that should probably be cleaned up at the same time.
--EdLoach 12:09, 19 May 2011 (BST)
- +1, should be replaced by redirect to Key:addr. --Tordanik 20:38, 19 May 2011 (BST)