<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="EstimatedDateBirth" />
  <url value="https://senaite.com/modeling/fhir/StructureDefinition/EstimatedDateBirth" />
  <version value="0.01" />
  <name value="EstimatedDateBirth" />
  <status value="draft" />
  <description value="If the date of birth is unknown to a high degree of precision" />
  <fhirVersion value="4.3.0" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="Patient" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension">
      <path value="Extension" />
      <short value="If the date of birth was not known precisely" />
      <definition value="true if the date of birth is unknown precisely" />
      <max value="1" />
    </element>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <max value="0" />
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="https://senaite.com/modeling/fhir/StructureDefinition/EstimatedDateBirth" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <short value="Is the date of birth unknown for sure?" />
      <definition value="True if the date of birth is unknown" />
      <type>
        <code value="boolean" />
      </type>
      <isModifierReason value="Date of birth is assumed to be precisely known" />
    </element>
  </differential>
</StructureDefinition>