Root Zone Label Generation Rules

Root Zone Label Generation Rules (RZ-LGR) define a conservative mechanism to determine valid Internationalized Domain Names (IDNs) and their variant labels.

Process

The process for developing RZ-LGR follows the Procedure to Develop and Maintain the Label Generation Rules for the Root Zone in Respect of IDNA Labels, last updated in 2013. Broadly speaking, Step #, a Generation Panel makes a broad set of code points for the relevant script, called the "Maximal Starting Repertoire," and proposes Label Generation Rules. Step #, the team's proposal is reviewed by the ICANN Community through Public Comment and then by the Integration Panel for approval and integration into the LGR for the Root Zone.

Completed

The latest version, RZ-LGR-4, published in November 2020, includes 18 scripts:

• Chinese,
• Bangla,
• Arabic,
• Devanagari,
• Ethiopic,
• Georgian,
• Gujarati,
• Gurmukhi,
• Hebrew,
• Kannada,
• Khmer,
• Lao,
• Malayalam,
• Oriya,
• Sinhala,
• Tamil,
• Telugu, and
• Thai.