<status value="draft" /> <description value="Indicates whether the immunization event is considered clinically valid." /> <fhirVersion value="4.0.1" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="Immunization" /> </context> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension"> <path value="Extension" /> <short value="Indicates if the administration is clinically valid" /> <definition value="A boolean flag indicating if the immunization event is considered clinically valid according to the schedule or clinical evaluation." /> </element> <element id="Extension.extension"> <path value="Extension.extension" /> <max value="0" /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="http://ontariohealth.ca/fhir/ehr/StructureDefinition/ext-immunization-isValid" /> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]" /> <min value="1" /> <type> <code value="boolean" /> </type> </element> </differential> </StructureDefinition>