Internationalised Domain Name Extensions to the Extensible Provisioning Protocol v1.1 schema. Domain-specific types and attributes. User and DNS presentation forms of a domain This should be of type internationalisedLabelType Registration of language with IANA requires the definition of a Script or Language Designator (http://www.iana.org/procedures/idn-repository.html). The linked document above notes that Language Designators are defined in BCP 47 (http://www.rfc-editor.org/rfc/bcp/bcp47.txt), which satisfies the requirements of the language datatype and RFC3066 (BCP 47, Section 2.2.8). Should this be moved directly into the resDataType? - assumes that userForm of namePair is of type internationalisedLabelType