<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="CompositionMERT" />
  <url value="https://intrahealth.com/fhir/mert/StructureDefinition/CompositionMERT" />
  <name value="CompositionMERT" />
  <title value="Composition (MERT)" />
  <status value="draft" />
  <description value="This profile describes the Composition for MERT." />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Composition" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Composition" />
  <derivation value="constraint" />
  <differential>
    <element id="Composition.status">
      <path value="Composition.status" />
      <comment value="MERT only supports Composition.status of preliminary or final." />
      <mustSupport value="true" />
      <binding>
        <strength value="required" />
        <valueSet value="https://intrahealth.com/fhir/mert/ValueSet/mert-composition-status-vs" />
      </binding>
    </element>
    <element id="Composition.type">
      <path value="Composition.type" />
      <comment value="Preferred binding to FHIR Document Type Codes is intentionally left as base (LOINC encouraged) to avoid over-constraining local document type coding." />
      <mustSupport value="true" />
    </element>
    <element id="Composition.subject">
      <path value="Composition.subject" />
      <min value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="https://intrahealth.com/fhir/mert/StructureDefinition/PatientMERT" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Composition.encounter">
      <path value="Composition.encounter" />
      <mustSupport value="true" />
    </element>
    <element id="Composition.date">
      <path value="Composition.date" />
      <mustSupport value="true" />
    </element>
    <element id="Composition.author">
      <path value="Composition.author" />
      <max value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="https://intrahealth.com/fhir/mert/StructureDefinition/PractitionerMERT" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Composition.title">
      <path value="Composition.title" />
      <mustSupport value="true" />
    </element>
    <element id="Composition.section">
      <path value="Composition.section" />
      <min value="1" />
      <max value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Composition.section.title">
      <path value="Composition.section.title" />
      <mustSupport value="true" />
    </element>
    <element id="Composition.section.text">
      <path value="Composition.section.text" />
      <comment value="Narrative summary for human interpretation is required for MERT sections." />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Composition.section.entry">
      <path value="Composition.section.entry" />
      <comment value="MERT receivers are not required to process section.entry." />
    </element>
    <element id="Composition.section.section">
      <path value="Composition.section.section" />
      <comment value="MERT receivers are not required to process nested sections." />
    </element>
  </differential>
</StructureDefinition>