<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="http://www.iknl.nl/fhir/StructureDefinition/onco-mamma-dataelement-540" />
  <name value="totaal_aantal_onderzochte_klieren" />
  <status value="draft" />
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  <kind value="resource" />
  <abstract value="false" />
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  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" />
  <derivation value="constraint" />
  <differential>
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      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-display-hint">
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      </extension>
      <path value="Observation.status" />
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    <element id="Observation.code.coding.system">
      <path value="Observation.code.coding.system" />
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    </element>
    <element id="Observation.code.coding.code">
      <path value="Observation.code.coding.code" />
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    </element>
    <element id="Observation.subject">
      <path value="Observation.subject" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://fhir.nl/fhir/StructureDefinition/nl-core-patient" />
        <aggregation value="contained" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x]:valueQuantity">
      <path value="Observation.valueQuantity" />
      <sliceName value="valueQuantity" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.value[x]:valueQuantity.system">
      <path value="Observation.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
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    <element id="Observation.value[x]:valueQuantity.code">
      <path value="Observation.valueQuantity.code" />
      <fixedCode value="1" />
    </element>
  </differential>
</StructureDefinition>