<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="communication-ca-core" />
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="2" />
  </extension>
  <url value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/communication-ca-core" />
  <version value="1.1.0" />
  <name value="CommunicationCACore" />
  <title value="Communication (CA-Core)" />
  <status value="active" />
  <experimental value="false" />
  <publisher value="Canada Health Infoway" />
  <contact>
    <name value="National Standards Release Centre" />
    <telecom>
      <system value="url" />
      <value value="http://www.infoway-inforoute.ca" />
    </telecom>
    <telecom>
      <system value="email" />
      <value value="standards@infoway-inforoute.ca" />
    </telecom>
  </contact>
  <description value="This profile applies constraints to the Communication resource for CA Core+ to support asynchronous message exchange in the pan-Canadian context." />
  <jurisdiction>
    <coding>
      <system value="urn:iso:std:iso:3166" />
      <code value="CA" />
    </coding>
  </jurisdiction>
  <copyright value="Copyright © 2025+ Canada Health Infoway. All rights reserved. [Terms of Use and License Agreements](https://ic.infoway-inforoute.ca/en/about/tou). [Privacy Policy](https://www.infoway-inforoute.ca/en/legal/privacy-policy)." />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Communication" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Communication" />
  <derivation value="constraint" />
  <differential>
    <element id="Communication.basedOn">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.basedOn" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.basedOn.identifier">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.basedOn.identifier" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.basedOn.identifier.system">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.basedOn.identifier.system" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.basedOn.identifier.value">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.basedOn.identifier.value" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.inResponseTo">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.inResponseTo" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/communication-ca-core" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Communication.status">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.status" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.category">
      <path value="Communication.category" />
      <type>
        <code value="CodeableConcept" />
        <profile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/codeableconcept-ca-core" />
      </type>
    </element>
    <element id="Communication.subject">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.subject" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/patient-ca-core" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Group" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Communication.subject.reference">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.subject.reference" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.subject.identifier">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.subject.identifier" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.subject.identifier.system">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.subject.identifier.system" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.subject.identifier.value">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.subject.identifier.value" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.encounter">
      <path value="Communication.encounter" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/encounter-ca-core" />
      </type>
    </element>
    <element id="Communication.sent">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.sent" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.received">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.received" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.recipient">
      <path value="Communication.recipient" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Device" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/organization-ca-core" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/patient-ca-core" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/practitioner-ca-core" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/practitionerRole-ca-core" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Group" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/CareTeam" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/healthcareservice-ca-core" />
      </type>
    </element>
    <element id="Communication.sender">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.sender" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Device" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/organization-ca-core" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/patient-ca-core" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/practitioner-ca-core" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/practitionerRole-ca-core" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/healthcareservice-ca-core" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Communication.sender.reference">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.sender.reference" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.sender.identifier">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.sender.identifier" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.sender.identifier.system">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.sender.identifier.system" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.sender.identifier.value">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.sender.identifier.value" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.reasonReference">
      <path value="Communication.reasonReference" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/condition-ca-core" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Observation" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/diagnosticreport-ca-core" />
        <targetProfile value="http://fhir.infoway-inforoute.ca/cacore/StructureDefinition/documentreference-ca-core" />
      </type>
    </element>
    <element id="Communication.payload">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.payload" />
      <mustSupport value="true" />
    </element>
    <element id="Communication.payload.content[x]">
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:populate-if-known" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/producer" />
        </extension>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/obligation">
        <extension url="code">
          <valueCode value="SHALL:no-error" />
        </extension>
        <extension url="actor">
          <valueCanonical value="http://fhir.infoway-inforoute.ca/ca-core/ActorDefinition/consumer" />
        </extension>
      </extension>
      <path value="Communication.payload.content[x]" />
      <mustSupport value="true" />
    </element>
  </differential>
</StructureDefinition>