<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="Ro-Substance" />
  <meta>
    <lastUpdated value="2017-11-22T22:08:13.294+00:00" />
  </meta>
  <url value="https://simplifier.net/SAM-TST/Ro-Substance" />
  <name value="Ro-Substance" />
  <status value="draft" />
  <date value="2017-11-17T11:35:36.043+00:00" />
  <fhirVersion value="3.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Substance" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Substance" />
  <derivation value="constraint" />
  <differential>
    <element id="Substance.category.coding.system">
      <path value="Substance.category.coding.system" />
      <fixedUri value="http://hl7.org/fhir/ValueSet/substance-category" />
    </element>
    <element id="Substance.category.coding.code">
      <path value="Substance.category.coding.code" />
      <fixedCode value="chemical" />
    </element>
    <element id="Substance.code">
      <path value="Substance.code" />
      <binding>
        <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
          <valueString value="SubstanceCode" />
        </extension>
        <strength value="required" />
        <valueSetReference>
          <reference value="https://ontology-services.ro.com/ROX1468229739571" />
        </valueSetReference>
      </binding>
    </element>
    <element id="Substance.instance">
      <path value="Substance.instance" />
      <max value="0" />
    </element>
    <element id="Substance.ingredient.substance[x]">
      <path value="Substance.ingredient.substance[x]" />
      <type>
        <code value="CodeableConcept" />
      </type>
      <type>
        <code value="Reference" />
        <targetProfile value="https://simplifier.net/SAM-TST/Ro-Substance" />
      </type>
    </element>
  </differential>
</StructureDefinition>