Data type MSG in FHIR

How the components of data type MSG (Message Type) become FHIR R4 elements, from the HL7 Version 2 to FHIR guide.

HL7 v2 definition
Definition of MSG in HL7 v2 2.8
Maps
CodeCodingMessageHeader

To Code1 rows

HL7 v2 sourcev2 typeFHIR elementFHIR typeConditions and notes
MSG.2Trigger Event
ID$this

To Coding3 rows

HL7 v2 sourcev2 typeFHIR elementFHIR typeConditions and notes
MSG
display
Value MSG.1+"^"+MSG.2+"^"+MSG.3
MSG.2Trigger Event
IDcode
MSG.2Trigger Event
IDsystem
Value "http://terminology.hl7.org/CodeSystem/v2-0003"

To MessageHeader3 rows

HL7 v2 sourcev2 typeFHIR elementFHIR typeConditions and notes
MSG.2Trigger Event
IDeventCoding.codecode
Code map v2-0003
MSG.2Trigger Event
IDeventCoding.systemuri
Value "http://terminology.hl7.org/CodeSystem/v2-0003"
MSG.3Message Structure
IDdefinitioncanonical