In our examples, the syntax will be described in generic DNS record format/zone file format:
<OWNER-NAME> <TTL> <CLASS> <TYPE> <DATA>
- OWNER-NAME (or ONAME): The domain or hostname of the current resource record. This is distinct from the Registrant (the "owner" of a domain name registration). If the ONAME does not end in a ".", the current $ORIGIN zone will be appended to it. The @ special character denotes the current $ORIGIN (explained next). The first record of a zone must have an OWNER-NAME; it is optional in all subsequent records. When omitted, the last used OWNER-NAME will be used.
- TTL: (optional) The Time to Live (TTL) of the current record. This governs how long resolvers will keep this answer in their local cache before refreshing from an authoritative nameserver for the domain being queried. If no TTL...
