http://hl7.org/fhir/StructureDefinition/iso21090-ADXP-unitID|4.0.1

The number or name of a specific unit contained within a building or complex, as assigned by that building or complex.

element_id	types
Extension
Extension.extension
Extension.url
Extension.value[x]	string
Extension
Extension.id	http://hl7.org/fhirpath/System.String
Extension.extension	Extension
Extension.url	http://hl7.org/fhirpath/System.String
Extension.value[x]	string