When using the
wm.ip.hl7.tn.service:send service to send HL7 version 2.x messages, the sender and the receiver of the message are determined from the value of the
senderID/senderIDType and
receiverID/receiverIDType parameters respectively. However, these fields are optional. If no values are provided for these parameters, the sender and the receiver will be determined using the values of the MSH.3 Sender Application and MSH.5 Receiver Application fields in the message header of the HL7 message being sent. For more information see the usage notes of the
wm.ip.hl7.tn.service:send service.