replaced invalid multipolygon (had a way containing a single node) with a simple way.

removed left-over relations (had no tags and only one member)

removed superfluous node that caused overlap between multipolygon rings

replaced broken multipolygon (which only grouped two houses anyway) by a single amenity node.

removed redundant way from multipolygon

Fixed broken multipolygon (had overlapping rings) by individually tagging individual buildings.

Replaced broken multipolygon by ways

closed multipolygon

converted single-way-multipolygon to way

Fixed broken multipolygon

changed type of site containing roads from (ill-formed) multipolygon to "site"; closed (previously ill-formed) multipolygon "Ham Common"; Fixed typo in name

fixed ill-formed multipolygon (inner member not actually being inside an outer polygon

changed relation type for groups of individually tagged buildings from "multipolygon" to the more appropriate "site". This also fixes a multipolygon-contains-relation bug.

removed redundant inner multipolygons (their relevant ways were already forming the desired inner polygon).

removed german personal numerical ratings (on age, facilities, special features, cladding, ...)

fixed typos in tag names; replaced obscure tags by more widely used ones.

fixed typos in tag names; replaced obscure tags by more widely used ones.

fixed typos in tag names; replaced obscure tags by more widely used ones.

fixed typos in keys; replaced obscure keys by more prevalent ones

fixed invalid tags