Welcome to Second-Level Reference Label Generation Rules Development Project

ICANN has developed second-level Internationalized Domain Name (IDN) tables in machine-readable format or Label Generation Rules (LGRs) that registry operators can reference while designing their IDN tables. These reference LGRs will be used by ICANN org when reviewing IDN tables submitted for use with the generic top-level domains (gTLDs).

The reference LGRs have been developed using guidelines, which have been reviewed by the community. These LGRs are provided below in the XML format along with a more readable HTML format.

If you have questions or feedback regarding these reference LGRs, please visit the Reference LGR webpage or send an email to IDNprogram@icann.org.