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Additional Second-Level Reference Label Generation Rules (LGRs) Published

13 January 2021

LOS ANGELES – 13 January 2021 – The Internet Corporation for Assigned Names and Numbers (ICANN) today announced the publication of additional second-level reference Label Generation Rules (LGRs).

Second-level reference Label Generation Rules are published to improve the transparency and consistency of the Internationalized Domain Name (IDN) table review process that facilitates the registry operations of new generic top-level domains (gTLDs). The reference IDN tables are based on the Guidelines for Developing Reference Label Generation Rules (LGRs), which were finalized after community review. These reference LGRs will be used in reviewing IDN tables submitted by the gTLD registries, e.g., through the Registry Service Evaluation Policy (RSEP) process.

Additional reference LGRs have been developed based on the detailed analysis and finalized solutions completed by the script community for the Root Zone Label Generation Rules (RZ-LGRs). Seventeen second-level reference LGRs have been finalized and released after Public Comment proceedings, including the Bangla, Devanagari, Ethiopic, Georgian, Gujarati, Gurmukhi, Kannada, Khmer, Lao, Malayalam, Oriya, Tamil, and Telugu script-based LGRs, and the Arabic, Chinese, Hindi, and Thai language-based LGRs.

A total of 30 language-based reference LGRs and 13 script-based reference LGRs have been published. The remaining languages and scripts will be included in future releases as relevant community input becomes available.


ICANN's mission is to help ensure a stable, secure, and unified global Internet. To reach another person on the Internet, you need to type an address – a name or a number – into your computer or other device. That address must be unique so computers know where to find each other. ICANN helps coordinate and support these unique identifiers across the world. ICANN was formed in 1998 as a not-for-profit public-benefit corporation with a community of participants from all over the world.