-script-representative-chars defined in fontset.el. Other databases in
-fontset.el might also need to be updated as needed.
+script-representative-chars defined in fontset.el, and also the list
+of OTF script tags in otf-script-alist, whose source is on this page:
+
+ https://www.microsoft.com/typography/otspec/scripttags.htm
+
+Other databases in fontset.el might also need to be updated as needed.
+
+The function 'ucs-names', defined in lisp/international/mule-cmds.el,
+might need to be updated because it knows about used and unused ranges
+of Unicode codepoints, which a new release of the Unicode Standard
+could change.
+
+Finally, test normalization functions against NormalizationTests.txt,
+in the test/ directory run:
+
+ make lisp/international/ucs-normalize-tests
+
+See commentary in test/lisp/international/ucs-normalize-tests.el
+regarding failing lines.