<StructureDefinition xmlns="http://hl7.org/fhir">
  <meta />
  <url value="http://tomas.sanchez.falcon.org/StructureDefinition/BirthTime" />
  <name value="BirthTime" />
  <status value="draft" />
  <date value="2018-03-14T12:49:36.403+01:00" />
  <description value="This is my extension for birth date" />
  <fhirVersion value="3.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="Patient" />
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="http://tomas.sanchez.falcon.org/StructureDefinition/BirthTime" />
    </element>
    <element id="Extension.value[x]:valueDateTime">
      <path value="Extension.valueDateTime" />
      <sliceName value="valueDateTime" />
      <type>
        <code value="dateTime" />
      </type>
    </element>
  </differential>
</StructureDefinition>