From 310801cdfc8de727e8b285ec6df9728b9ca75afc Mon Sep 17 00:00:00 2001
From: Matt King <a11yThinker@gmail.com>
Date: Sun, 8 Oct 2017 12:42:38 -0700
Subject: [PATCH] Navigation Menubar Example: Add aria-expanded validation note

For issue #447, Added the following note below the roles, states, and properties table on the navigation menubar example page:

> Currently, using aria-expanded on elements with role menuitem triggers HTML validation errors because the ARIA specification does not yet support doing so.
> The ARIA working group plans to resolve this issue in the next version of the specification.
> Until a version of ARIA that resolves the issue becomes a W3C recommendation, it is safe to ignore these validation errors.
> Alternatively, since only a few browser and assistive technology combinations exploit this feature of the pattern, it can be omitted from implementations.

IN the two rows of the table about aria-expanded, added text to see note below.
---
 examples/menubar/menubar-1/menubar-1.html | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/examples/menubar/menubar-1/menubar-1.html b/examples/menubar/menubar-1/menubar-1.html
index 8c534a144a..fe2aab911c 100644
--- a/examples/menubar/menubar-1/menubar-1.html
+++ b/examples/menubar/menubar-1/menubar-1.html
@@ -561,7 +561,7 @@ <h3 id="rps2_label">Submenu</h3>
           <td>
             <code>a</code>
           </td>
-          <td>Indicates the submenu is open.</td>
+          <td>Indicates the submenu is open. (<strong>See note below.</strong>)</td>
         </tr>
         <tr>
           <td></td>
@@ -571,7 +571,7 @@ <h3 id="rps2_label">Submenu</h3>
           <td>
             <code>a</code>
           </td>
-          <td>Indicates the submenu is closed.</td>
+          <td>Indicates the submenu is closed. (<strong>See note below.</strong>)</td>
         </tr>
         <tr>
           <th>
@@ -590,6 +590,15 @@ <h3 id="rps2_label">Submenu</h3>
         </tr>
       </tbody>
     </table>
+    <h3>Note</h3>
+    <p>
+      Currently, using aria-expanded on elements with role menuitem triggers HTML validation errors because the ARIA specification does not yet support doing so.
+      The ARIA working group plans to resolve this issue in the next version of the specification.
+      Until a version of ARIA that resolves 
+      <a href="https://github.com/w3c/aria/issues/454">the issue</a> 
+      becomes a W3C recommendation, it is safe to ignore these validation errors. 
+      Alternatively, since only a few browser and assistive technology combinations exploit this feature of the pattern, it can be omitted from implementations.
+    </p>
   </section>
 
   <section>