http://hl7.org/fhir/StructureDefinition/codesystem-keyWord|4.0.1

Word or words used in an information retrieval system to indicate the content of the value set.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/string