<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://hl7.pt/fhir/StructureDefinition/RequiredBehavior" />
  <version value="1.0" />
  <name value="RequiredBehavior" />
  <status value="draft" />
  <experimental value="false" />
  <description value="Defines the required behavior for the action." />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="ActivityDefinition.useContext" />
  </context>
  <context>
    <type value="element" />
    <expression value="ActivityDefinition.timing[x]" />
  </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://hl7.pt/fhir/StructureDefinition/RequiredBehavior" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <type>
        <code value="code" />
      </type>
      <binding>
        <strength value="required" />
        <description value="Defines expectations around whether an action or action group is required." />
        <valueSet value="http://hl7.org/fhir/ValueSet/action-required-behavior" />
      </binding>
    </element>
  </differential>
</StructureDefinition>