http://hl7.org/fhir/StructureDefinition/elementdefinition-identifier|4.0.1

External Identifiers associated with this element - these are identifiers that are associated with the concept this element represents.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/Identifier