Address records are probably used in most database, but I\'ve seen a number of slightly different sets of fields used to store them. The number of fields seems to vary from
Premises elements
Thoroughfare elements
Locality elements
Postcode element
This answer may be a few years late, but it's aimed at those like myself looking for guidance on how to correctly format postal addresses for both storing in a database (or the likes of it) and for printing purposes.
Taken from Royal Mail Doc, link below - conveniently titled the 'Programmers Guide'
Page 27 - 42 was most helpful for me.