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

This resource came into being as a result of expectations set in the referenced Definition resource. I.e. This resource represents a 'step' dictated within the protocol/order set/etc.
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/ObservationDefinition
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/PlanDefinition
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/Questionnaire
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/Reference
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/ObservationDefinition
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/PlanDefinition
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/Questionnaire
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/uri