CLDR-14194 define the skeleton in unitPreferences more precisely (uni…

…code-org#728)

docs/ldml/tr35-info.html

@@ -2188,8 +2188,11 @@ <h2>14 <a href="#Unit_Preferences" name="Unit_Preferences">Unit Preferences</a><
 
 <li>The unit is the element value
 <li>The skeleton (if there is one) supplies formatting information for the unit. API settings may allow that to be overridden.
+  <ul>
+    <li class='changed'>The syntax and semantics for the skeleton value are defined by the <a href="https://unicode-org.github.io/icu/userguide/format_parse/numbers/skeletons.html">ICU Number Skeletons</a> document.</li>
+  </ul>
 <li>If the unit is mixed (eg foot:inch) the skeleton applies to the final subunit; the higher subunits are formatted as integers.
-<li>If the skeleton is missing, the default number formatting is used.</li></ul>
+<li>If the skeleton is missing, the default<span class='changed'> is skeleton=&quot;<strong>precision-integer/@@*</strong>&quot;. However, the client can also override or tune the number formatting</span>.</li></ul>
 
 <h3>Constraints</h3>
 

docs/ldml/tr35.html

@@ -9068,10 +9068,15 @@ <h2><a name="Modifications" href="#Modifications" id=
           added description of <a href="#SCRIPT_CODE" >SCRIPT_CODE</a> value for key “dx”.</li>
         </ul>
 	  </li>
-
+	  <li ><strong>Part 6: <a href=
+    "tr35-info.html#Contents">Supplemental</a> (supplemental
+        data)</strong>
+	    <ul>
+	      <li><strong>Section 14 <a href="tr35-info.html#Unit_Preferences">Unit Preferences</a></strong>: defined the userPreferences skeleton more precisely.</li>
+        </ul>
+	  </li>
 	</ul>
-
-    <p><b>Revision 59</b></p>
+	<p><b>Revision 59</b></p>
 	<ul>
 	  <li class="changed" ><b>Updated</b> for CLDR 37.</li>