[css-text-4] Do not apply ideograph-alpha/ideograph-numeric spacing t…

…o non-zero margin/border/padding w3c#6950

css-text-4/Overview.bs

@@ -8107,12 +8107,14 @@ Character Class Spacing: the 'text-spacing' property</h3>
 		<dt><dfn>ideograph-alpha</dfn>
 		<dd>
 			Creates extra spacing between runs of
-			<a>ideographs</a> and <a>non-ideographic letters</a>.
+			<a>ideographs</a> and <a>non-ideographic letters</a>,
+			see [[#inter-script-spacing]].
 
 		<dt><dfn>ideograph-numeric</dfn>
 		<dd>
 			Creates extra spacing between runs of
-			<a>ideographs</a> and <a>non-ideographic numerals</a> glyphs.
+			<a>ideographs</a> and <a>non-ideographic numerals</a>,
+			see [[#inter-script-spacing]].
 
 		<dt><dfn>punctuation</dfn>
 		<dd>
@@ -8128,12 +8130,6 @@ Character Class Spacing: the 'text-spacing' property</h3>
 			<a href="https://github.com/w3c/csswg-drafts/issues/318">Issue 318</a>
 	</dl>
 
-	Note: A commonly used algorithm for ''ideograph-alpha'' and ''ideograph-numeric''
-	is specified in [[JLREQ]].
-	Spacing conventions vary, but values typically range from 1/4em to as low as 1/8em,
-	with 1/4em being particularly common in monospace contexts
-	and 1/6em being more common in proportional typesetting.
-
 	This property is additive with the 'word-spacing' and 'letter-spacing' properties.
 	That is, the amount of spacing contributed by the 'letter-spacing' setting (if any)
 	is added to the spacing created by 'text-spacing'.
@@ -8153,6 +8149,19 @@ Character Class Spacing: the 'text-spacing' property</h3>
 
 	Issue: It was requested to add a value for doubling the space after periods.
 
+<h4 id="inter-script-spacing">
+Inter-script Spacing</h4>
+
+	The ''ideograph-alpha'' and ''ideograph-numeric'' values
+	introduce spacing at the boundary between particular classes of characters
+	when they are directly adjoining on a line,
+	i.e. without any intervening non-zero [=margin=], [=border=], or [=padding=]
+	or intervening characters (such as a quotation mark or a space).
+
+	Note: Spacing conventions vary, but values typically range from 1/4ic to as low as 1/8ic,
+	with 1/4ic being particularly common in monospace contexts
+	and 1/6ic being more common in proportional typesetting.
+
 <h4 id="fullwidth-collapsing">
 Fullwidth Punctuation Collapsing</h4>