The central address management (ZAV) was already used in Release 4.0 in many applications, see the Release note:
Central address management for Release 4.0
More core application areas are converted to the central address management for 4.5:
Conversion of customer/vendor master data to CAM
SD/WS changes for CAM
The Postal Regional structure ('City file') is now in CAM. These are ( Postal code, City and Street) data objects to simplify address entry and checking.
The central City, Street name and postal code in the postal regional structure ensures the correct spelling and format of addresses. Address entry is also simplified by search help and country-specific algorithms. In the Netherlands, for example, the specification of postal code and house number is sufficient to specify an address completely. In Germany, the postal code can often be derived directly from the City.