http://hl7.org/fhir/StructureDefinition/iso21090-TEL-address|4.0.1

A V3 compliant, RFC 3966 conformant URI version of the telephone or fax number.

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