Editorial: introduce more shadow-including terms for CSS

Fixes #225.

dom.bs

@@ -5423,6 +5423,14 @@ otherwise.</p>
 <dfn export id=concept-shadow-including-inclusive-descendant>shadow-including inclusive descendant</dfn>
 is an object or one of its <a>shadow-including descendants</a>.
 
+<p>An object <var>A</var> is a
+<dfn export id=concept-shadow-including-ancestor>shadow-including ancestor</dfn> of an object
+<var>B</var>, if and only if <var>B</var> is a <a>shadow-including descendant</a> of <var>A</var>.
+
+<p>A
+<dfn export id=concept-shadow-including-inclusive-ancestor>shadow-including inclusive ancestor</dfn>
+is an object or one of its <a>shadow-including ancestors</a>.
+
 <hr>
 
 <p class="XXX">For now you can find more information about this object in

dom.html

@@ -3196,6 +3196,8 @@ <h3 class="heading settled" data-level="4.8" id="interface-shadowroot"><span cla
 object’s <a data-link-type="dfn" href="#concept-tree-root">root</a> is a <a data-link-type="dfn" href="#concept-shadow-root">shadow root</a>, and its <a data-link-type="dfn" href="#concept-tree-root">root</a> otherwise.</p>
    <p>An object <var>A</var> is a <dfn data-dfn-type="dfn" data-export="" id="concept-shadow-including-descendant">shadow-including descendant<a class="self-link" href="#concept-shadow-including-descendant"></a></dfn> of an object <var>B</var>, if <var>A</var> is a <a data-link-type="dfn" href="#concept-tree-descendant">descendant</a> of <var>B</var>, or <var>A</var>’s <a data-link-type="dfn" href="#concept-tree-root">root</a> is a <a data-link-type="dfn" href="#concept-shadow-root">shadow root</a> and <var>A</var>’s <a data-link-type="dfn" href="#concept-tree-root">root</a>’s <a data-link-type="dfn" href="#concept-documentfragment-host">host</a> is a <a data-link-type="dfn" href="#concept-shadow-including-inclusive-descendant">shadow-including inclusive descendant</a> of <var>B</var>. </p>
    <p>A <dfn data-dfn-type="dfn" data-export="" id="concept-shadow-including-inclusive-descendant">shadow-including inclusive descendant<a class="self-link" href="#concept-shadow-including-inclusive-descendant"></a></dfn> is an object or one of its <a data-link-type="dfn" href="#concept-shadow-including-descendant">shadow-including descendants</a>. </p>
+   <p>An object <var>A</var> is a <dfn data-dfn-type="dfn" data-export="" id="concept-shadow-including-ancestor">shadow-including ancestor<a class="self-link" href="#concept-shadow-including-ancestor"></a></dfn> of an object <var>B</var>, if and only if <var>B</var> is a <a data-link-type="dfn" href="#concept-shadow-including-descendant">shadow-including descendant</a> of <var>A</var>. </p>
+   <p>A <dfn data-dfn-type="dfn" data-export="" id="concept-shadow-including-inclusive-ancestor">shadow-including inclusive ancestor<a class="self-link" href="#concept-shadow-including-inclusive-ancestor"></a></dfn> is an object or one of its <a data-link-type="dfn" href="#concept-shadow-including-ancestor">shadow-including ancestors</a>. </p>
    <hr>
    <p class="XXX">For now you can find more information about this object in <a href="https://w3c.github.io/webcomponents/spec/shadow/">Shadow DOM</a>. The DOM Standard will be
 updated over time to cover more details. </p>
@@ -5534,9 +5536,9 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
      <li><a href="#dom-document-doctype">attribute for Document</a><span>, in §4.5</span>
      <li><a href="#concept-doctype">definition of</a><span>, in §4.6</span>
     </ul>
-   <li><a href="#dom-document-document">Document()</a><span>, in §4.5</span>
    <li><a href="#document">Document</a><span>, in §4.5</span>
    <li><a href="#concept-document">document</a><span>, in §4.5</span>
+   <li><a href="#dom-document-document">Document()</a><span>, in §4.5</span>
    <li><a href="#dom-document-documentelement">documentElement</a><span>, in §4.5</span>
    <li><a href="#document-element">document element</a><span>, in §4.2.1</span>
    <li><a href="#documentfragment">DocumentFragment</a><span>, in §4.7</span>
@@ -6026,7 +6028,9 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#concept-range-bp-set">set the end</a><span>, in §5.2</span>
    <li><a href="#concept-range-bp-set">set the start</a><span>, in §5.2</span>
    <li><a href="#dom-node-setuserdata">setUserData()</a><span>, in §8.2</span>
+   <li><a href="#concept-shadow-including-ancestor">shadow-including ancestor</a><span>, in §4.8</span>
    <li><a href="#concept-shadow-including-descendant">shadow-including descendant</a><span>, in §4.8</span>
+   <li><a href="#concept-shadow-including-inclusive-ancestor">shadow-including inclusive ancestor</a><span>, in §4.8</span>
    <li><a href="#concept-shadow-including-inclusive-descendant">shadow-including inclusive descendant</a><span>, in §4.8</span>
    <li><a href="#shadow-including-preorder-depth-first-traversal">shadow-including preorder, depth-first traversal</a><span>, in §4.8</span>
    <li><a href="#concept-shadow-including-root">shadow-including root</a><span>, in §4.8</span>