http://hl7.org/fhir/StructureDefinition/workflow-instantiatesCanonical|5.2.0

The URL pointing to a FHIR-defined protocol, guideline, orderset or other definition that is adhered to in whole or in part by the event or request resource.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/canonical
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/ActivityDefinition
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/Measure
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/OperationDefinition
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/PlanDefinition
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/Questionnaire