update PR with element name change and attr expectations

- update pr from selectedoption to selectedconent
- map to the generic role (in the event someone misuses the element and declares it outside of its expected location, as a child of the button part within a select.
- note that in its intended usage, the button part will be inert, and thus any global html or aria attributes used on the element would not be exposed to the a11y api

html-aam/index.html

@@ -6343,20 +6343,19 @@ <h4 id="el-select-combobox">`select`<span class="el-context"> (with NO `multiple
             </tr>
           </tbody>
         </table>
-        <h4 id="el-selectedoption">`selectedoption`</h4>
-        <table aria-labelledby="el-selectedoption">
+        <h4 id="el-selectedcontent">`selectedcontent`</h4>
+        <table aria-labelledby="el-selectedcontent">
           <tbody>
             <tr>
               <th>HTML Specification</th>
               <td>
-                <a data-cite="HTML">`selectedoption`</a>
+                <a data-cite="HTML">`selectedcontent`</a>
               </td>
             </tr>
             <tr>
               <th>[[wai-aria-1.2]]</th>
               <td>
-                ???
-                <!-- todo: not mapped, html-selectedoption, generic, or none? -->
+                <div class="general"><a class="core-mapping" href="#role-map-generic">`generic`</a> role</div>
               </td>
             </tr>
             <tr>
@@ -6368,31 +6367,37 @@ <h4 id="el-selectedoption">`selectedoption`</h4>
                 <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">???</div>
+                <div class="general"><div class="general">Use WAI-ARIA mapping</div></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">???</div>
+                <div class="general"><div class="general">Use WAI-ARIA mapping</div></div>
               </td>
             </tr>
             <tr>
               <th><a href="https://gnome.pages.gitlab.gnome.org/atk/">ATK</a></th>
               <td>
-                <div class="general">???</div>
+                <div class="general"><div class="general">Use WAI-ARIA mapping</div></div>
               </td>
             </tr>
             <tr>
               <th><a href="https://developer.apple.com/reference/appkit/nsaccessibility">AX</a></th>
               <td>
-                <div class="general">???</div>
+                <div class="general"><div class="general">Use WAI-ARIA mapping</div></div>
               </td>
             </tr>
             <!-- <th><a href="#accessible-name-and-description-computation">Naming Algorithm</a></th> -->
             <tr>
               <th>Comments</th>
-              <td></td>
+              <td>
+                <p>The `selectedcontent` element is meant to be declared as a child of the `button` part of a custom styled `select` element.
+                As the `button` part is meant to be treated as inert, the `selectedcontent` element will commonly be treated as inert, as well.</p>
+                <p class=note>
+                  As the parent `button` element to the `selectedcontent` element is meant to be treated as inert, any use of global HTML or ARIA attributes, or attributes specific to the `selectedcontent` element would not be exposed to the user agent's accessibility API.
+                </p>
+              </td>
             </tr>
           </tbody>
         </table>