<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://example.org/fhir/StructureDefinition/MyPatient" />
  <name value="SianPatient" />
  <status value="draft" />
  <description value="Sian's patient example for FHIR training" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Patient" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Patient" />
  <derivation value="constraint" />
  <differential>
    <element id="Patient">
      <path value="Patient" />
      <definition value="Sian's patient example for FHIR training" />
    </element>
    <element id="Patient.extension">
      <path value="Patient.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="open" />
      </slicing>
      <min value="0" />
    </element>
    <element id="Patient.extension:SianOccExtension">
      <path value="Patient.extension" />
      <sliceName value="SianOccExtension" />
      <short value="SianOccExtension" />
      <definition value="occ extension for Patient example in FHIR training" />
      <min value="0" />
      <type>
        <code value="Extension" />
        <profile value="https://sianoccextexample.org/fhir/StructureDefinition/MyExtension" />
      </type>
      <mustSupport value="true" />
      <isModifier value="false" />
    </element>
    <element id="Patient.extension:SianOccExtension.value[x]">
      <path value="Patient.extension.value[x]" />
      <binding>
        <strength value="extensible" />
        <description value="Value set for occupation extension" />
        <valueSet value="http://www.alpha-hospital.alp/occupations" />
      </binding>
    </element>
    <element id="Patient.extension:BirthPlace">
      <path value="Patient.extension" />
      <sliceName value="BirthPlace" />
      <short value="BirthPlace" />
      <min value="0" />
      <type>
        <code value="Extension" />
        <profile value="http://hl7.org/fhir/StructureDefinition/patient-birthPlace" />
      </type>
      <mustSupport value="true" />
      <isModifier value="false" />
    </element>
    <element id="Patient.identifier">
      <path value="Patient.identifier" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="system" />
        </discriminator>
        <rules value="open" />
      </slicing>
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Patient.identifier:NationalID">
      <path value="Patient.identifier" />
      <sliceName value="NationalID" />
      <max value="1" />
      <fixedIdentifier>
        <system value="https://fhir.nhs.uk/Id/nhs-number" />
      </fixedIdentifier>
    </element>
    <element id="Patient.identifier:NationalID.system">
      <path value="Patient.identifier.system" />
      <min value="1" />
    </element>
    <element id="Patient.identifier:NationalID.value">
      <path value="Patient.identifier.value" />
      <min value="1" />
    </element>
    <element id="Patient.identifier:LocalID">
      <path value="Patient.identifier" />
      <sliceName value="LocalID" />
      <max value="1" />
      <fixedIdentifier>
        <system value="https://fhir.abuhb.nhs.wales/Id/pas-identifier" />
      </fixedIdentifier>
    </element>
    <element id="Patient.identifier:LocalID.system">
      <path value="Patient.identifier.system" />
      <min value="1" />
    </element>
    <element id="Patient.identifier:LocalID.value">
      <path value="Patient.identifier.value" />
      <min value="1" />
    </element>
    <element id="Patient.name">
      <path value="Patient.name" />
      <min value="1" />
      <type>
        <code value="HumanName" />
        <profile value="https://sian.example.org/fhir/StructureDefinition/SianHumanName" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Patient.gender">
      <path value="Patient.gender" />
      <mustSupport value="true" />
    </element>
    <element id="Patient.birthDate">
      <path value="Patient.birthDate" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Patient.address">
      <path value="Patient.address" />
      <constraint>
        <key value="sian-address-1" />
        <severity value="error" />
        <human value="If temp address period must be completed" />
        <expression value="(use = 'temp') implies period.exists()" />
      </constraint>
    </element>
    <element id="Patient.address.use">
      <path value="Patient.address.use" />
      <condition value="sian-address-1" />
    </element>
    <element id="Patient.address.period">
      <path value="Patient.address.period" />
      <condition value="sian-address-1" />
    </element>
  </differential>
</StructureDefinition>