http://hl7.org/fhir/StructureDefinition/valueset-workflowStatusDescription|5.2.0

Workflow Status is used to represent details of the value set development process while in a single Activity Status.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/string