default namespace = "http://download.research.icann.org/rdns/1.1"

# A document may either be a single zone (update) or a collection of zones (view)
start = zone | zonelist | zonereflist

# A list of zone names for view only.
zonereflist = element zonereflist {
  attribute version {
    xsd:decimal { minInclusive="1.1" fractionDigits="1" }
  },
  zoneref*
}

# A bulk list of zones for view only.
zonelist = element zonelist {
  attribute version {
    xsd:decimal { minInclusive="1.1" fractionDigits="1" }
  },
  zone*
}

# A zone reference (accepted by REST engine for query)
zoneref = element zoneref {
  attribute name { text },
  attribute href { xsd:anyURI }
}

# A single zone record
zone = element zone {
  # The zone record's name, eg 10.in-addr.arpa
  attribute name { text },
  # The customer optional, derived from known state. eg ARIN
  attribute cust { text }?,
  # The canonical URL for this zone record (optional)
  attribute href { xsd:anyURI }?,
  # The address space for the zone record (optional)
  attribute ipversion { "ipv4" | "ipv6" }?,
  # The state of the zone (optional)
  attribute state { "active" | "pending" | "error" }?,
  # The last modified timestamp in UTC (optional)
  attribute modified  { xsd:dateTime }?,
  # The schema version (optional)
  attribute version {
    xsd:decimal { minInclusive="1.1" fractionDigits="1" }
  }?,
  # A zone NS RRset must have at least two NS records
  nserver,
  nserver+,
  # It may contain some DS records
  ds*
}

# DNS-SEC records
ds = element ds {
  # rdata must contain  <Keytag> | <Algorithm> | <Digest type> | <Digest>
  # as per RFC 4034
  # 
  element rdata { text }
}


# A single name server
nserver = element nserver {
  # An nserver entry must contain a DNS FQDN name for a NS RR (RFC 1035)
  element fqdn { text }
}