schema:             INETNUM-SCHEMA
ref:                dn42.inetnum
key:                inetnum     required  single    schema
key:                cidr        required  single    primary
key:                netname     required  single
key:                nserver     optional  multiple  > [domain-name]
key:                country     optional  multiple
key:                descr       optional  single
key:                status      optional  single    > {ALLOCATED|ASSIGNED} {PI|PA|}
key:                policy      optional  single    > {open|closed|ask|reserved}
key:                admin-c     optional  multiple  lookup=dn42.person,dn42.role
key:                tech-c      optional  multiple  lookup=dn42.person,dn42.role
key:                zone-c      optional  multiple  lookup=dn42.person,dn42.role
key:                ds-rdata    optional  multiple
key:                mnt-by      optional  multiple  lookup=dn42.mntner
key:                mnt-lower   optional  multiple  lookup=dn42.mntner
key:                mnt-routes  optional  multiple  lookup=dn42.mntner
key:                org         optional  single    lookup=dn42.organisation
key:                remarks     optional  multiple
key:                source      required  single    lookup=dn42.registry
mnt-by:             DN42-MNT
