Add guidance for mark role

content/practices/names-and-descriptions/names-and-descriptions-practice.html

@@ -929,6 +929,13 @@ <h2><span id="naming_role_guidance_heading">Accessible Name Guidance by Role</sp
                 Using <code>aria-label</code> is functionally equivalent to providing off-screen text in the contents of the log element, except off-screen text would be announced by screen readers that do not support <code>aria-label</code> on <code>log</code> elements.
               </td>
             </tr>
+            <tr>
+              <td>
+                <a href="#mark" class="role-reference"><code>mark</code></a>
+              </td>
+              <td>Prohibited</td>
+              <td></td>
+            </tr>
             <tr>
               <td>
                 <a href="#main" class="role-reference"><code>main</code></a>

content/practices/structural-roles/structural-roles-practice.html

@@ -149,6 +149,10 @@ <h2>All Structural Roles and Their HTML Equivalents</h2>
               <th>listitem</th>
               <td>li</td>
             </tr>
+            <tr>
+              <th>mark</th>
+              <td>mark</td>
+            </tr>
             <tr>
               <th>math</th>
               <td>No equivalent element</td>