diff --git a/index.html b/index.html
index 1337ad1..db8f7f2 100644
--- a/index.html
+++ b/index.html
@@ -6550,6 +6550,56 @@ <h1 id="title" class="title">HTML Accessibility API Mappings 1.0</h1>
             </tr>
           </tbody>
         </table>
+        </section><section id="selectedoption"><div class="header-wrapper"><h4 id="el-selectedoption"><bdi class="secno">3.5.TODO </bdi><code>selectedoption</code></h4><a class="self-link" href="#el-selectedoption" aria-label="Permalink for Section 3.5.TODO"></a></div>
+        <table aria-labelledby="el-selectedoption">
+          <tbody>
+            <tr>
+              <th><abbr title="HyperText Markup Language">HTML</abbr> Specification</th>
+              <td>
+                <a data-type="element" href="https://html.spec.whatwg.org/multipage/scripting.html#the-selectedoption-element"><code>selectedoption</code></a>
+              </td>
+            </tr>
+            <tr>
+              <th>[<cite><a class="bibref" data-link-type="biblio" href="#bib-wai-aria-1.2" title="Accessible Rich Internet Applications (WAI-ARIA) 1.2">wai-aria-1.2</a></cite>]</th>
+              <td>No corresponding role</td>
+            </tr>
+            <tr>
+              <th><a href="https://www.w3.org/TR/core-aam-1.2/#roleMappingComputedRole">Computed Role</a></th>
+              <td class="role-computed"><div class="general">Not mapped</div></td>
+            </tr>
+            <tr>
+              <th>
+                <a href="https://msdn.microsoft.com/en-us/library/dd373608%28v=VS.85%29.aspx"><abbr title="Microsoft Active Accessibility">MSAA</abbr></a> + <a href="http://accessibility.linuxfoundation.org/a11yspecs/ia2/docs/html/">IAccessible2</a>
+              </th>
+              <td>
+                <div class="general">Not mapped</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">Not mapped</div>
+              </td>
+            </tr>
+            <tr>
+              <th><a href="https://gnome.pages.gitlab.gnome.org/atk/">ATK</a></th>
+              <td>
+                <div class="general">Not mapped</div>
+              </td>
+            </tr>
+            <tr>
+              <th><a href="https://developer.apple.com/reference/appkit/nsaccessibility">AX</a></th>
+              <td>
+                <div class="general">Not mapped</div>
+              </td>
+            </tr>
+            
+            <tr>
+              <th>Comments</th>
+              <td></td>
+            </tr>
+          </tbody>
+        </table>
         </section><section id="slot"><div class="header-wrapper"><h4 id="el-slot"><bdi class="secno">3.5.116 </bdi><code>slot</code></h4><a class="self-link" href="#el-slot" aria-label="Permalink for Section 3.5.116"></a></div>
         <table aria-labelledby="el-slot">
           <tbody>
@@ -17028,4 +17078,4 @@ <h1 id="title" class="title">HTML Accessibility API Mappings 1.0</h1>
   panel.hidden = true;
   panel.classList.remove("docked");
 }
-})()</script><script src="https://www.w3.org/scripts/TR/2021/fixup.js"></script></body></html>
\ No newline at end of file
+})()</script><script src="https://www.w3.org/scripts/TR/2021/fixup.js"></script></body></html>