http://hl7.org/fhir/StructureDefinition/artifact-identifier|5.2.0

A formal identifier that is used to identify this artifact when it is represented in other formats, or referenced in a specification, model, design or an instance.
element_idtypes
Extension
Extension.extension
Extension.url
Extension.value[x]
Extension
Extension.id
Extension.extension
Extension.url
Extension.value[x]