<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://Rohiesexample.org/fhir/StructureDefinition/RohiesMyAlpCorePatient" />
  <name value="RohiesMyAlpCorePatient" />
  <status value="draft" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Patient" />
  <baseDefinition value="http://fhir.alp/StructureDefinition/AlpCorePatient" />
  <derivation value="constraint" />
  <differential>
    <element id="Patient.address">
      <path value="Patient.address" />
      <constraint>
        <key value="Rohie-Add-01" />
        <severity value="error" />
        <human value="temporary address must have a period" />
        <xpath value="(use = 'temp') implies period.exists()" />
      </constraint>
    </element>
    <element id="Patient.address.use">
      <path value="Patient.address.use" />
      <condition value="Rohie-Add-01" />
    </element>
    <element id="Patient.address.period">
      <path value="Patient.address.period" />
      <condition value="Rohie-Add-01" />
    </element>
  </differential>
</StructureDefinition>