add obsolete dir element

the dir element is semantically equivalent to the UL element, and thus it should also map to role=list.

As browsers have recently updated the rendering of this element to have visual consistency with the UL element / across browsers, then too, the mappings should update to match what is spec'd in HTML.

index.html

@@ -1980,6 +1980,58 @@ <h4 id=el-dialog>`dialog`</h4>
     </tr>
   </tbody>
 </table>
+<h4 id="el-dir">`dir`</h4>
+<table aria-labelledby="el-dir">
+  <tbody>
+    <tr>
+      <th>HTML Specification</th>
+      <td>
+        <a data-cite="HTML">`dir`</a>
+      </td>
+    </tr>
+    <tr>
+      <th>[[wai-aria-1.2]]</th>
+      <td>
+        <a class="core-mapping" href="#role-map-list">`list`</a> role
+      </td>
+    </tr>
+    <tr>
+      <th><a data-cite="core-aam-1.2/#roleMappingComputedRole">Computed Role</a></th>
+      <td class="role-computed"><div class="general">Use WAI-ARIA mapping</div></td>
+    </tr>
+    <tr>
+      <th><a href="https://msdn.microsoft.com/en-us/library/dd373608%28v=VS.85%29.aspx">MSAA</a> + <a href="http://accessibility.linuxfoundation.org/a11yspecs/ia2/docs/html/">IAccessible2</a></th>
+      <td>
+        <div class="general">Use WAI-ARIA mapping</div>
+      </td>
+    </tr>
+    <tr>
+      <th><a href="https://msdn.microsoft.com/en-us/library/ms726297%28v=VS.85%29.aspx">UIA</a></th>
+      <td>
+        <div class="general">Use WAI-ARIA mapping</div>
+      </td>
+    </tr>
+    <tr>
+      <th><a href="https://gnome.pages.gitlab.gnome.org/atk/">ATK</a></th>
+      <td>
+        <div class="general">Use WAI-ARIA mapping</div>
+      </td>
+    </tr>
+    <tr>
+      <th><a href="https://developer.apple.com/reference/appkit/nsaccessibility">AX</a></th>
+      <td>
+        <div class="general">Use WAI-ARIA mapping</div>
+      </td>
+    </tr>
+    <!-- <th><a href="#accessible-name-and-description-computation">Naming Algorithm</a></th> -->
+    <tr>
+      <th>Comments</th>
+      <td>
+        The `dir` element is marked as obsolete in HTML, and is not to be used by authors. 
+      </td>
+    </tr>
+  </tbody>
+</table>
 <h4 id=el-div>`div`</h4>
 <table aria-labelledby=el-div>
   <tbody>