[css-fonts-4] link to OpenType, TrueType, and Graphite table definitions

Author: svgeesus

css-fonts-4/Overview.bs

@@ -6670,29 +6670,54 @@ The System Font is the font which is used by the ''system-ui'' <a href="#system-
 
     The 'features-opentype', 'features-aat' and 'features-graphite' technologies
 	refer to support for font features,
-    commonly implemented in [[!OPENTYPE]] with the <code>GSUB</code> and the <code>GPOS</code> tables,
-    as well as in [[!AAT-FEATURES]] using the <code>morx</code> and <code>kerx</code> tables
-	and [[!GRAPHITE]] with the <code>Silf</code>, <code>Glat </code>, <code>Gloc </code>,
-	<code>Feat </code> and <code>Sill </code> tables.
+    commonly implemented in [[!OPENTYPE]] with the
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/gsub">GSUB</a></code> and the
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/gpos">GPOS</a></code> tables,
+    as well as in [[!AAT-FEATURES]] using the
+	<code><a href="https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6morx.html">morx</a></code> and
+	<code><a href="https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6kerx.html">kerx</a></code> tables
+	and [[!GRAPHITE]] with the
+	<code>Silf</code>,
+	<code>Glat </code>,
+	<code>Gloc </code>,
+	<code>Feat </code> and
+	<code>Sill </code> tables
+	as documented in the
+	<a href="http://scripts.sil.org/cms/sites/nrsi/media/GraphiteBinaryFormat_pdf.pdf">Graphite Table Format</a>.
     The section on [[#font-rend-props]] describes properties that interact with these facilities.
 
     The 'variations' technology refers to the support of font variations,
     commonly implemented in [[!OPENTYPE]] with the
-    <code>avar</code>, <code>cvar</code>, <code>fvar</code>, <code>gvar</code>, <code>HVAR</code>, <code>MVAR</code>, <code>STAT</code>, and <code>VVAR</code> tables,
-    as well as in [[!AAT-FEATURES]] using the <code>avar</code>, <code>cvar</code>, <code>fvar</code>, and <code>gvar</code> tables.
+    <code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/avar">avar</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/cvar">cvar</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/fvar">fvar</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/gvar">gvar</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/hvar">HVAR</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/mvar">MVAR</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/stat">STAT</a></code>, and
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/vvar">VVAR</a></code> tables,
+    as well as in [[!AAT-FEATURES]] using the
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/avar">avar</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/cvar">cvar</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/fvar">fvar</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/gvar">gvar</a></code> tables.
     The section on [[#basic-font-props]] as well as the section on [[#font-variation-props]]
     describe properties that interact with these facilities.
 
     The 'color-colrv0', 'color-colrv1', 'color-svg', 'color-sbix' and 'color-cbdt'
 	technologies refers to various types of color font file technologies.
     Each one represents a table
-	(<code>COLR</code>, <code>SVG</code> <code>sbix</code> or <code>cbdt</code>)
+	(<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/colr">COLR</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/svg">SVG</a></code>,
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/sbix">sbix</a></code> or
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/cbdt">CBDT</a></code>)
     inside [[!OPENTYPE]] or [[!AAT-FEATURES]] fonts which must be supported
     to satisfy this requirement.
 
     The 'palettes' technology refers to support for font palettes,
     commonly implemented in the [[!OPENTYPE]] and [[!AAT-FEATURES]]
-    with the <code>CPAL</code> table.
+    with the
+	<code><a href="https://docs.microsoft.com/en-us/typography/opentype/spec/cpal">CPAL</a></code> table.
     The section on [[#color-font-support]] describes properties that interact with these facilities.
 
 	The 'incremental' technology refers to client support for