the current PostalAddress Enity will be supplimented but new entities that deal with expanded information.
these entities is fashioned after the xAL:2.0
http://www.oasis-open.org/committees/ciq/ciq.html#6
PostalService entity convers Postoffice information used for bulk mailing
This includes barcode for the address.
AdministrativeArea entity covers more general information that allows non specific data to help identify and locations.
Country entiy might be tied into the Geocode.
in the way ofbiz works Country should be the top entity and the PostalAddress should revferenced as the Address lines
The US Postal rules is the Top line should be for Attn to or Company name. The Line closest to the city, Postallocal should have the delivery info address line.
Based on Country the number of address lines and the sequence varies.