lame per name or address

does bind 9 (and 8) consider a name or an address lame? i.e. how bad is it
to do something like this:

$ORIGIN example.com.
@               IN NS ns1
                IN NS ns2
ns1             IN A 1.2.3.4
                IN A 5.6.7.8
ns2             IN A 9.10.11.12
                IN A 13.14.15.16

where the two addresses each name actually is two different boxes.


        jakob