<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="http://hl7.org/fhir/StructureDefinition/PatientUSA" />
  <name value="PatientUSA" />
  <status value="draft" />
  <date value="2018-01-09T16:00:31.256-05:00" />
  <description value="StructureDefinition for a USA Patient." />
  <fhirVersion value="3.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Patient" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Patient" />
  <derivation value="constraint" />
  <differential>
    <element id="Patient.identifier">
      <path value="Patient.identifier" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="assigner.reference" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Patient.identifier:SocialSecurityNumber">
      <path value="Patient.identifier" />
      <sliceName value="SocialSecurityNumber" />
    </element>
    <element id="Patient.address.extension">
      <path value="Patient.address.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Patient.address.extension:PlaceOfBirth">
      <path value="Patient.address.extension" />
      <sliceName value="PlaceOfBirth" />
      <short value="Optional Extensions Element" />
      <definition value="Optional Extension Element - found in all resources." />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="http://hl7.org/fhir/StructureDefinition/PlaceOfBirth" />
      </type>
    </element>
  </differential>
</StructureDefinition>