Restrict aria-owns on roles with children presentational (#1812)

Co-authored-by: Scott O'Hara <[email protected]>
Co-authored-by: Peter Krautzberger <[email protected]>

Author: 3 people

index.html

@@ -706,6 +706,7 @@ <h3>Presentational Children</h3>
 				</dd>
 			</dl>
 			<p>The <abbr title="Document Object Model">DOM</abbr> descendants are presentational. [=user agents=] SHOULD NOT expose descendants of this <a>element</a> through the platform <a>accessibility <abbr title="Application Programing Interface">API</abbr></a>. If [=user agents=] do not hide the descendant nodes, some information might be read twice.</p>
+			<p>Authors MUST NOT specify <pref>aria-owns</pref> on an element which has Presentational Children.</p>
 		</section>
 		<section id="implictValueForRole">
 			<h3>Implicit Value for Role</h3>
@@ -12173,6 +12174,7 @@ <h2>Definitions of States and Properties (all aria-* attributes)</h2>
 				<p>The value of the <pref>aria-owns</pref> <a>attribute</a> is a space-separated ID reference list that references one or more elements in the document by ID. The reason for adding <pref>aria-owns</pref> is to expose a parent/child contextual relationship to <a>assistive technologies</a> that is otherwise impossible to infer from the <abbr title="Document Object Model">DOM</abbr>.</p>
 				<p>If an element has both <pref>aria-owns</pref> and  <abbr title="Document Object Model">DOM</abbr> children then the order of the child elements with respect to the parent/child relationship is the <abbr title="Document Object Model">DOM</abbr> children first, then the elements referenced in <pref>aria-owns</pref>. If the author intends that the <abbr title="Document Object Model">DOM</abbr> children are not first, then list the DOM children in <pref>aria-owns</pref> in the desired order. Authors SHOULD NOT use <pref>aria-owns</pref> as a replacement for the <abbr title="Document Object Model">DOM</abbr> hierarchy. If the relationship is represented in the DOM, do not use <pref>aria-owns</pref>.</p>
 				<p>Authors MUST ensure that an element's ID is not specified in more than one other element's <pref>aria-owns</pref> attribute at any time. In other words, an element can have only one explicit owner. Authors MUST NOT create circular references with <pref>aria-owns</pref>. In the case of authoring error with <pref>aria-owns</pref>, the user agent MAY ignore some <pref>aria-owns</pref> element references in order to build a consistent model of the content.</p>
+				<p>Authors MUST NOT specify <pref>aria-owns</pref> on an element which has <a href="#childrenArePresentational">Presentational Children</a>.</p>
 			</div>
 			<table class="property-features">
 				<caption>Characteristics:</caption>