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427 Proposed Update UTS #18, Unicode Regular Expressions Closing Date: 2021.07.13
Status: Open
Originator: UTC
Informal Discussion: Unicode Mail List (Join)
Formal Feedback: Contact Form

Description of Issue:

This Unicode Technical Standard will be updated for Unicode 14.0. The proposed update is now available for general public review and comment. Draft updated 2021-02-22.

  • 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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