http://hl7.org/fhir/StructureDefinition/replaces|5.2.0

This indicates a separate conformance resource instance that is superseded by the current instance.
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/Resource