/// url = 'http://hl7.org/fhir/StructureMap/DocumentReference5to4B'
/// name = 'DocumentReference5to4B'
/// title = 'FML Conversion for DocumentReference: R5 to R4B'
/// status = 'active'

conceptmap "DocumentReferenceStatus" {
  prefix s = "http://hl7.org/fhir/document-reference-status"
  prefix t = "http://hl7.org/fhir/4.3/document-reference-status"

  s:current - t:current
  s:superseded - t:superseded
  s:"entered-in-error" - t:"entered-in-error"
}

conceptmap "ReferredDocumentStatus" {
  prefix s = "http://hl7.org/fhir/composition-status"
  prefix t = "http://hl7.org/fhir/4.3/composition-status"

  s:preliminary - t:preliminary
  s:final - t:final
  s:amended - t:amended
  s:"entered-in-error" - t:"entered-in-error"
}

uses "http://hl7.org/fhir/StructureDefinition/DocumentReference" alias DocumentReferenceR5 as source
uses "http://hl7.org/fhir/4.3/StructureDefinition/DocumentReference" alias DocumentReferenceR4B as target

imports "http://hl7.org/fhir/StructureMap/*5to4B"

group DocumentReference(source src : DocumentReferenceR5, target tgt : DocumentReferenceR4B) extends DomainResource <<type+>> {
  src.identifier -> tgt.identifier;
  src.status as v -> tgt.status = translate(v, '#DocumentReferenceStatus', 'code'); // src.version -> tgt.version;
  src.docStatus as v -> tgt.docStatus = translate(v, '#ReferredDocumentStatus', 'code');
  src.type -> tgt.type; // src.modality -> tgt.modality;
  src.category -> tgt.category;
  src.subject -> tgt.subject;
  src.context : Reference as s ->  tgt.context as t,  t.encounter = s;
  src.event as s ->  tgt.context as t,  t.event = s;
  src.facilityType as s ->  tgt.context as t,  t.facilityType = s;
  src.practiceSetting as s ->  tgt.context as t,  t.practiceSetting = s;
  src.period as s ->  tgt.context as t,  t.period = s;
  src.date -> tgt.date; // src.bodySite -> tgt.bodySite;
  src.author -> tgt.author;
  src.attester as s where src.attester.mode = 'professional' -> tgt then {
    s.party -> tgt.authenticator;
  };
  src.custodian -> tgt.custodian;
  src.relatesTo as s -> tgt.relatesTo as t then DocumentReferenceRelatesTo(s, t);
  src.description -> tgt.description;
  src.securityLabel -> tgt.securityLabel;
  src.content as s -> tgt.content as t then DocumentReferenceContent(s, t);
}

group DocumentReferenceRelatesTo(source src, target tgt) extends BackboneElement {
  src.code as s -> tgt then {
    s.coding as sc -> tgt.code = sc;
  };
  src.target -> tgt.target;
}

group DocumentReferenceContent(source src, target tgt) extends BackboneElement {
  src.attachment -> tgt.attachment;
  src.profile as s -> tgt then {
    s.value : Coding -> tgt.format;
  };
}