427	Proposed Update UTS #18, Unicode Regular Expressions	Closing Date: 2022.01.17
Status:	Closed
Originator:	UTC
Informal Discussion:	Unicode Mail List (Join)
Formal Feedback:	Contact Form
Resolution:	The UTS will be updated and published.

Description of Issue:

This Unicode Technical Standard will be updated. The proposed update is now available for general public review and comment. Draft updated 2021-04-29.

• Draft 3 now incorporates other changes: https://www.unicode.org/reports/tr18/tr18-22.html#Modifications
• Adds two missing Emoji properties
• Modifies the EBNF to fix synchronization problems between the different sections, be more complete, and add examples where useful.
• Clarifies the notation and adds examples in Annex D: Resolving Character Classes with Strings
• Adds a new Annex F with guidance on parsing character classes.
• Explicitly narrowed the complement operator [^...] to be code point complement, for backwards compatibility.
• Added information on (a) usage of \q with properties and (b) possible syntax enhancements for \q.
• Changed the ¬ notation for complement to the more standard mathematical notation using the symbol ∁.
• Makes a number of wordsmithing improvements

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