MSH segment

The MSH (Message Header Segment) defines the intent, source, destination, and some specifics of the syntax of a message. These are the required elements for POU:

SEQ LENGTH Data Type OPTIONAL ELEMENT NAME Infor POU Expected Value
1 1 ST R Field Separator "|"
2 4 ST R Encoding Characters "^~\&"
3 180 EI O Sending Application SENDING_APP
4 180 EI O Sending Facility SENDING_FAC
9 7 CM R Message Type MESSAGE_TYPE
10 20 ST R Message Control ID MESSAGE_CTRL_ID
12 60 VID R Version ID HL7_VER