Why zfs get share.nfs.all doesn't show rw setting?

I'm trying to understand the new Solaris 11.1 zfs sharing mechanism.Although I can individually set and get the rw option, why can't I get it any of the ".all" queries?

$ zfs set share.nfs.rw=host.domain.com archive/dataset
$ zfs set share.nfs=on archive/dataset

$ zfs get share.nfs.rw archive/dataset
NAME             PROPERTY              VALUE                       SOURCE
archive/dataset  share.nfs.sec.sys.rw  host.domain.com             local

$ zfs get share.nfs.all archive/dataset
NAME          PROPERTY             VALUE  SOURCE
archive/dataset  share.nfs.aclok      off    default
archive/dataset  share.nfs.anon              default
archive/dataset  share.nfs.charset.*  ...    default
archive/