> Sometimes it is necessary for mailing to provide Postal Box
information and in Canada this must be provided on a separate line
below the address line.
It is workable to put it into the addendum. However, that may
not be conpatible with rules for formatting addresses in CA.
Adding an addr_line2 is IMO quite ugly. My suggestion (based
on yours) would be to have
address."aux_street"...
address."subunit"...
address."addendum"...
Locale-specific address formatters would, of course, need to
know which field to print/show where.
Comments please.