perldelta| perldoc.perl.org
This Hacker News comment by GuB-42 intrigued me:| paulbutler.org
Unicode® 16.0.0| www.unicode.org
About the Unicode Character Database| www.unicode.org
Unicode® Technical Standard #10| unicode.org
Unicode® Standard Annex #9| www.unicode.org
Unicode® Standard Annex #31| www.unicode.org
Specifies the Unicode Normalization Formats| www.unicode.org