<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://fhir.nhs.uk/STU3/StructureDefinition/Extension-eRS-Specialty-1" />
  <version value="1.0.0" />
  <name value="Extension-eRS-Specialty-1" />
  <status value="draft" />
  <date value="2021-02-11T11:09:30.931+00:00" />
  <publisher value="NHS Digital" />
  <contact>
    <name value="Interoperabilityteam@nhs.net" />
    <telecom>
      <system value="email" />
      <value value="interoperabilityteam@nhs.net" />
      <use value="work" />
    </telecom>
  </contact>
  <description value="A simple extension that holds an eRS specialty code." />
  <copyright value="Copyright © 2020 NHS Digital" />
  <fhirVersion value="3.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="CommunicationRequest" />
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <snapshot />
  <differential>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="https://fhir.nhs.uk/STU3/StructureDefinition/Extension-eRS-Specialty-1" />
    </element>
    <element id="Extension.valueCodeableConcept:valueCodeableConcept">
      <path value="Extension.valueCodeableConcept" />
      <sliceName value="valueCodeableConcept" />
      <min value="1" />
      <type>
        <code value="CodeableConcept" />
      </type>
      <binding>
        <strength value="required" />
        <description value="Specialty" />
        <valueSetReference>
          <reference value="https://fhir.nhs.uk/STU3/ValueSet/eRS-Specialty-1" />
        </valueSetReference>
      </binding>
    </element>
  </differential>
</StructureDefinition>