<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="ca-on-phsd-ext-contact-purpose" />
  <url value="https://ontariohealth.ca/fhir/StructureDefinition/ca-on-phsd-ext-contact-purpose" />
  <name value="ContactPurpose" />
  <status value="draft" />
  <description value="Used to capture additional information about a telecom (or other contact type) contact entry, such as its usage as an after-hours line or crisis line, or denoting a toll-free number. FHIR R6 captures a similar concept in ExtendedContactDetail.purpose." />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="ContactPoint" />
  </context>
  <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="https://ontariohealth.ca/fhir/StructureDefinition/ca-on-phsd-ext-purpose" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <min value="1" />
      <type>
        <code value="Coding" />
      </type>
      <mustSupport value="true" />
      <binding>
        <strength value="required" />
        <description value="purpose of contact point such as phone number, email, fax, etc" />
        <valueSet value="http://ontariohealth.ca/fhir/ValueSet/phsd-contact-point-purpose" />
      </binding>
    </element>
    <element id="Extension.value[x].system">
      <path value="Extension.value[x].system" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Extension.value[x].code">
      <path value="Extension.value[x].code" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Extension.value[x].display">
      <path value="Extension.value[x].display" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
  </differential>
</StructureDefinition>