/// url = 'http://hl7.org/fhir/StructureMap/SupplyRequest4to3'
/// name = 'SupplyRequest4to3'
/// title = 'SupplyRequest Transforms: R4 to R3'
/// status = 'active'

uses "http://hl7.org/fhir/4.0/SupplyRequest" alias SupplyRequest as source
uses "http://hl7.org/fhir/3.0/SupplyRequest" alias SupplyRequestR3 as target

imports "http://hl7.org/fhir/StructureMap/*4to3"

group SupplyRequest(source src : SupplyRequestR3, target tgt : SupplyRequest) extends DomainResource <<type+>> {
  src.identifier -> tgt.identifier;
  src.status -> tgt.status;
  src.category -> tgt.category;
  src.priority -> tgt.priority;
  src.item : CodeableConcept as vs ->  tgt.orderedItem as t,  t.item = create('CodeableConcept') as vt then CodeableConcept(vs, vt);
  src.item : Reference as vs ->  tgt.orderedItem as t,  t.item = create('Reference') as vt then Reference(vs, vt);
  src.quantity as vs ->  tgt.orderedItem as t,  t.quantity as vt then Quantity(vs, vt);
  src.occurrence : dateTime as vs -> tgt.occurrence = create('dateTime') as vt then dateTime(vs, vt);
  src.occurrence : Period as vs -> tgt.occurrence = create('Period') as vt then Period(vs, vt);
  src.occurrence : Timing as vs -> tgt.occurrence = create('Timing') as vt then Timing(vs, vt);
  src.authoredOn -> tgt.authoredOn;
  src where requester.exists() or extension.where(url = 'http://hl7.org/fhir/3.0/StructureDefinition/extension-SupplyRequest.requester.onBehalfOf').exists() -> tgt.requester as vt0 then agent(src, vt0) "requester";
  src.supplier -> tgt.supplier;
  src.reasonCode as vs -> tgt.reason = create('CodeableConcept') as vt then CodeableConcept(vs, vt);
  src.reasonReference as vs -> tgt.reason = create('Reference') as vt then Reference(vs, vt);
  src.deliverFrom -> tgt.deliverFrom;
  src.deliverTo -> tgt.deliverTo;
}

group agent(source src, target tgt) {
  src.requester -> tgt.agent;
  src.extension as e where url = 'http://hl7.org/fhir/3.0/StructureDefinition/extension-SupplyRequest.requester.onBehalfOf' then {
    e.value -> tgt.onBehalfOf;
  };
}