Proposed update of UTS #46, for Unicode domain names

UTS #46 “Unicode IDNA Compatibility Processing” is used by many applications to support internationalized domain names with non-English characters. The proposed update to Version 10.0 regenerates the UTS #46 data files based on new additions to the Unicode repertoire, and adds three new parameters for processing: CheckHyphens, CheckBidi, and CheckJoiners. These parameters allow implementations to reflect current practice in browsers. The note about the use of IDNA2008 now includes the number of “missing” IDNA2008 characters (26,568), and is reworded for clarity.

There are two review notes requesting feedback on the use of Joiner characters.

For details and information about how to provide feedback, please see Public Review Issue #347.