<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="MyPatient" />
  <meta>
    <lastUpdated value="2019-02-28T19:03:36.8583101+00:00" />
  </meta>
  <url value="http://example.org/fhir/StructureDefinition/MyPatient" />
  <name value="MyPatient" />
  <status value="draft" />
  <date value="2019-02-28T19:03:36.6903156+00:00" />
  <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" />
      <label value="EHR" />
      <short value="this is the EHR id for a patient" />
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Patient.animal">
      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-explicit-type-name">
        <valueString value="Animal" />
      </extension>
      <path value="Patient.animal" />
      <max value="0" />
    </element>
  </differential>
</StructureDefinition>