expire, off, err := unpackUint32(msg, off)
	if err != nil {
		return SOAResource{}, &nestedError{"Expire", err}
	}
	minTTL, _, err := unpackUint32(msg, off)
	if err != nil {
		return SOAResource{}, &nestedError{"MinTTL", err}
	}
	return SOAResource{ns, mbox, serial, refresh, retry, expire, minTTL}, nil
}

// A TXTResource is a TXT Resource record.
type TXTResource struct {
	TXT []string
}