[css-fonts-4][editorial] Update changes

Author: svgeesus

css-fonts-4/Overview.bs

@@ -8666,6 +8666,44 @@ Changes
 <h3 id="changes-2021-12-21">Changes from the <a href="https://www.w3.org/TR/2021/WD-css-fonts-4-20211221/">21 December 2021 Working Draft</a> </h3>
 
 <ul>
+	<!-- to  5 Dec 2023 -->
+	<li>Clarified that keywords inside local() are an error</li>
+	<li>Clarified that the system-ui generic font family may be composite, and is affected by unicode coverage and content language</li>
+	<li>Removed culturally specific claims that particular typographic styles universally convey concepts such as formality or playfulness</li>
+	<li>Added a new generic(nastaliq) family, for Urdu, Persian, and other languages</li>
+	<li>Added a new generic(kai) family, for Simplified and Traditional Chinese</li>
+	<li>No longer claim that cursive and kaiti have identical meanings</li>
+	<li>Added a note on the historical reasons for the serif and sans-serif generic font families</li>
+	<li>Dropped the emoji generic font-family, because the font-variant-emoji property covers the desired functionality better</li>
+	<li>Added Internet Media Types to the table of font formats</li>
+	<li>Moved the consequences of installed fonts out of Taxonomy and into Font Matching Algorithm</li>
+	<li>Clarified that the font-family and src descriptors are no longer required for validity, as they can be added later by script.</li>
+	<li>Consistently use generic(fangsong) instead of fangsong, as the generic font family name. Note that it is script-specific</li>
+	<li>Defined a third type of font family name, &lt;system-family-name> which has some constraints on how it can be specified</li>
+	<li>Added a missing at-keword in the production of @font-feature-values</li>
+	<li>Refactored the @font-feature-values grammar</li>
+	<li>Restored some acknowlegements which had been dropped when porting CSS Fonts 3 into this specification</li>
+	<li>Redefined the grammar of the src attribute to use a &lt;font-src-list> production, rather than "see prose"</li>
+	<li>Deleted broken link to an informative reference which no longer exists</li>
+	<li>Described three classes of generic font families, including whether they are writing system (script) specific and whether they are always required to match to a locally installed font</li>
+	<li>Added a new functional notation, generic(), for new generic font families</li>
+	<li>Added a clarifying note about platform API limitations which might restrict color font rendering to sRGB</li>
+	<li>Removed leftover, no-longer applicable mention of "forcing colored glyphs not to be used"</li>
+	<li>Refined the font-palette computed value</li>
+	<li>Added an example of Nabla font with an animated palette</li>
+	<li>Described modified font-palette syntax and rules for interpolation
+		and percentage normalization, referencing the CSS Color specification</li>
+	<li>Clarified that the used color-scheme affects font-palette: normal</li>
+	<li>Added missing numeric range annotations for slope angle and font-feature-settings integer</li>
+	<li>Defined a production for &lt;family-name> </li>
+	<li>For locally installed fonts, used local(&lt;family-name>) </li>
+	<li>Fixed ambiguous descriptor auto-links </li>
+	<li>Fixed markup of the &ltlfamily-name> production </li>
+	<li>Defined feature and variation names with &lt;opentype-tag> rather than bare strings</li>
+	<li>Clarified that general math functions (not just calc) are allowed in @font-palette-values descriptors</li>
+	<li>Added the ''font-synthesis-position'' property'' </li>
+	<li>Added an example of a non-sRGB color in override-colors</li>
+	<li>Use rule-list rather than stylesheet in productions</li>
 	<!-- to 7 Mar 2023 -->
 	<li>Added URL request modifiers for crossorigin, referrerpolicy & integrity</li>
 	<li>Aligned the incremental tech keywords to match the latest Incremental Font Transfer specification</li>