http://hl7.org/fhir/StructureDefinition/diagnosticReport-addendumOf|5.2.0

The supplements or provides additional information for the target report.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/Reference
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/DiagnosticReport