[css-writing-modes] Clarify that central baseline is the ideographic central baseline. #5177

Author: fantasai

css-writing-modes-3/Overview.bs

@@ -1045,10 +1045,11 @@ Text Baselines</h3>
 
     </dd>
     <dt>central</dt>
-    <dd>The <dfn>central baseline</dfn>, which typically crosses the center
-      of the em box. If the font is missing this baseline,
+    <dd>The ideographic <dfn>central baseline</dfn>,
+      which typically crosses the center of the em box.
+      If the font is missing this baseline,
       it is assumed to be halfway between the ascender (<a>over</a>)
-      and descender (<a>under</a>) edges of the em box.
+      and descender (<a>under</a>) edges of the ideographic em box.
     </dd>
   </dl>
 
@@ -2512,6 +2513,15 @@ Privacy and Security Considerations {#priv-sec}
   Changes since the <a href="https://www.w3.org/TR/2019/CR-css-writing-modes-3-20190903">September
   2019 CSS Writing Modes Module Level 3 Candidate Recommendation</a></h3>
 
+  <ul>
+    <li>Clarified that the [=central baseline=] is the [=ideographic central baseline=].
+      (<a href="https://github.com/w3c/csswg-drafts/issues/5177">Issue 5177</a>)
+  </ul>
+
+  <h3 class="no-num" id="changes-20190903">
+  Changes since the <a href="https://www.w3.org/TR/2019/CR-css-writing-modes-3-20190903">September
+  2019 CSS Writing Modes Module Level 3 Candidate Recommendation</a></h3>
+
   No substantive change;
   minor editorial fixes
   (see issue <a href="https://github.com/w3c/csswg-drafts/issues/4293">4293</a>,

css-writing-modes-4/Overview.bs

@@ -1118,10 +1118,11 @@ Text Baselines</h3>
 
     </dd>
     <dt>central</dt>
-    <dd>The <dfn>central baseline</dfn>, which typically crosses the center
-      of the em box. If the font is missing this baseline,
+    <dd>The ideographic <dfn>central baseline</dfn>,
+      which typically crosses the center of the em box.
+      If the font is missing this baseline,
       it is assumed to be halfway between the ascender (<a>over</a>)
-      and descender (<a>under</a>) edges of the em box.
+      and descender (<a>under</a>) edges of the ideographic em box.
     </dd>
   </dl>
 
@@ -2790,6 +2791,16 @@ Privacy and Security Considerations {#priv-sec}
 
 <h2 class="no-num" id="changes">Changes</h2>
 
+<h3 class="no-num" id="changes-2019">
+Changes since the <a href="https://www.w3.org/TR/2019/CR-css-writing-modes-4-20190730/">July
+2019 CSS Writing Modes Module Level 4 Candidate Recommendation</a></h3>
+
+  <ul>
+    <li>
+      Clarified that the [=central baseline=] is the [=ideographic central baseline=].
+      (<a href="https://github.com/w3c/csswg-drafts/issues/5177">Issue 5177</a>)
+  </ul>
+
 <h3 class="no-num" id="changes-201805">
 Changes since the <a href="https://www.w3.org/TR/2018/CR-css-writing-modes-4-20180524">May
 2018 CSS Writing Modes Module Level 4 Candidate Recommendation</a></h3>