with regard to point 2, AF_DataRequest requires destination address only as per "The address mode in this structure must be either: afAddrNotPresent to let the reflector (source binding) figure out the destination address; afAddrGroup to send to a group; afAddrBroadcast to send a broadcast message; or afAddr16Bit to send directly (unicast) to a node." There is no mention of 64 bit address. Is it omitted by mistake?