<StructureDefinition xmlns="http://hl7.org/fhir">
  <meta />
  <url value="StructureDefinition/MyExtension" />
  <name value="Role" />
  <status value="draft" />
  <date value="2018-04-05T13:27:53.348-05:00" />
  <fhirVersion value="3.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <contextType value="datatype" />
  <context value="ContactDetail" />
  <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="StructureDefinition/MyExtension" />
    </element>
  </differential>
</StructureDefinition>