add/revise popover related attribute mappings

index.html

@@ -5009,6 +5009,63 @@ <h3>HTML Attribute State and Property Mappings</h3>
  <td class="ax"><div class="general">Not mapped</div></td>
  <td class="comments"></td>
  </tr>
+ <tr tabindex="-1" id="att-popover">
+ <th>`popover`</th>
+ <td class="elements">
+ <a data-cite="html/popover.html#the-popover-attribute">`popover`</a>
+ </td>
+ <td class="aria"><div class="general">???</div></td>
+ <td class="ia2"><div class="general">???</div></td>
+ <td class="uia"><div class="general">???</div></td>
+ <td class="atk"><div class="general">???</div></td>
+ <td class="ax"><div class="general">???</div></td>
+ <td class="comments"></td>
+ </tr>
+ <tr tabindex="-1" id="att-popovertarget">
+ <th>`popovertarget`</th>
+ <td class="elements">
+ <a data-cite="html/popover.html#attr-popovertarget">`button`</a>;
+ <a data-cite="html/popover.html#attr-popovertarget">`input type=button`</a>
+ </td>
+ <td class="aria"><div class="general">
+ <p>
+ If the associated element is displayed as a popover: 
+ <a class="core-mapping" href="#ariaExpandedTrue">`aria-expanded=true`</a>
+ </p>
+ <p>
+ If the associated element is hidden: 
+ <a class="core-mapping" href="#ariaExpandedFalse">`aria-expanded=false`</a>
+ </p>
+ <p>
+ If there is no associated element: 
+ <a class="core-mapping" href="#ariaExpandedUndefined">`aria-expanded=undefined`</a>
+ </p>
+ </td>
+ <td class="ia2"><div class="general">Use WAI-ARIA mapping</div></td>
+ <td class="uia"><div class="general">Use WAI-ARIA mapping</div></td>
+ <td class="atk"><div class="general">Use WAI-ARIA mapping</div></td>
+ <td class="ax"><div class="general">Use WAI-ARIA mapping</div></td>
+ <td class="comments">
+ <p>
+ If the associated element is not a direct sibling to the element with the `popovertarget` attribute in the DOM:
+ create an <a class="core-mapping" href="#ariaDetalis">`aria-details`</a> relation with the associated element.
+ Otherwise, there is no `aria-details` association.
+ </p>
+ </td>
+ </tr>
+ <tr tabindex="-1" id="att-popovertargetaction">
+ <th>`popovertargetaction`</th>
+ <td class="elements">
+ <a data-cite="html/popover.html#attr-popovertargetaction">`button`</a>;
+ <a data-cite="html/popover.html#attr-popovertargetaction">`input type=button`</a>
+ </td>
+ <td class="aria"><div class="general">Not mapped</div></td>
+ <td class="ia2"><div class="general">Not mapped</div></td>
+ <td class="uia"><div class="general">Not mapped</div></td>
+ <td class="atk"><div class="general">Not mapped</div></td>
+ <td class="ax"><div class="general">Not mapped</div></td>
+ <td class="comments"></td>
+ </tr>
  <tr tabindex="-1" id="att-poster">
  <th>`poster`</th>
  <td class="elements">