Release 5 Preview #2
FHIR Infrastructure Maturity Level: 1Informative

Mappings for the request pattern (see Mappings to Other Standards for further information & status).

RequestORC
    identifierORC.2, ORC.3
    instantiatesCanonicalVaries by domain
    instantiatesUriVaries by domain
    basedOnORC.8 (plus others)
    replacesHandled by message location of ORC (ORC.1=RO or RU)
    groupIdentifierORC.4
    statusORC.5
    statusReason
    intentN/A
    priorityTQ1.9
    doNotPerform
    codeVaries by domain
    subjectAccompanying PID segment
    encounterAccompanying PV1
    occurrence[x]Accompanying TQ1/TQ2 segments
    authoredOnORC.9
    requesterORC.12
    reported[x]
    performerTypePRT
    performerPRT
    reasonORC.16
    insuranceIN1/IN2
    supportingInfoAccompanying segments
    noteNTE
    relevantHistoryN/A
RequestAct[moodCode<=INT]
    identifier.identifier
    instantiatesCanonical.outboundRelationship[typeCode=DEFN].target
    instantiatesUri.outboundRelationship[typeCode=DEFN].target
    basedOn.outboundRelationship[typeCode=FLFS].target
    replaces.outboundRelationship[typeCode=RPLC].target
    groupIdentifier.inboundRelationship(typeCode=COMP].source[moodCode=INT].identifier
    status.status
    statusReason.inboundRelationship[typeCode=SUBJ].source[classCode=CACT, moodCode=EVN].reasonCOde
    intent.moodCode (nuances beyond PRP/PLAN/RQO would need to be elsewhere)
    priority.priorityCode
    code.code
    subject.participation[typeCode=SBJ].role
    encounter.inboundRelationship(typeCode=COMP].source[classCode<=PCPR, moodCode=EVN]
    occurrence[x].effectiveTime
    authoredOn.participation[typeCode=AUT].time
    requester.participation[typeCode=AUT].role
    reported[x].participation[typeCode=RPT].role
    performerType.participation[typeCode=PRF].role[scoper.determinerCode=KIND].code
    performer.participation[typeCode=PRF].role[scoper.determinerCode=INSTANCE]
    reason.reasonCode
    insurance.outboundRelationship[typeCode=COVBY].target
    supportingInfo.outboundRelationship[typeCode=PERT].target
    note.inboundRelationship(typeCode=SUBJ].source[classCode=ANNGEN, moodCode=EVN].value[xsi:type=ST]
    relevantHistory.inboundRelationship(typeCode=SUBJ].source[classCode=CACT, moodCode=EVN]