Revise UA, AT, and checker guidance per agreed text in issue 1178

index.html

@@ -2154,14 +2154,20 @@ <h2>Definition of Roles</h2>
  		  <p class="ednote" title="Validity changes combobox for ARIA 1.2">
 			   Please review the following carefully. As a result of these changes a combobox following the ARIA 1.1 combobox specification will no longer conform with the ARIA specification.
 		  </p>
-		  <p>
-			The ARIA 1.0 specification describes a <code>combobox</code> pattern where the input element with the <code>combobox</code> role references the popup element with <pref>aria-owns</pref> instead of <pref>aria-controls</pref>.
-			<a>User agents</a>, <a>assistive technologies</a>, and conformance checkers SHOULD continue to support the ARIA 1.0 pattern so that existing implementations of the ARIA 1.0 pattern remain functional.
-			The ARIA 1.1 specification describes a <code>combobox</code> pattern where the element with role <code>combobox</code> is a composite container instead of a focusable input.
-			<a>User agents</a> and <a>assistive technologies</a> did not adequately support the ARIA 1.1 pattern, so the ARIA 1.2 pattern supersedes the ARIA 1.1 pattern, which authors SHOULD abandon. 
-		  </p>
-				<p>The features and behaviors of combobox implementations vary widely. Consequently, there are many important authoring considerations. See the <cite><a href="" class="practices"><abbr title="Accessible Rich Internet Applications">WAI-ARIA</abbr> Authoring Practices</a></cite> for additional details on implementing combobox design patterns.</p>
-			</div>
+        <p>
+          The ARIA 1.0 specification describes a <code>combobox</code> pattern where the input element with the <code>combobox</code> role references the popup element with <pref>aria-owns</pref> instead of <pref>aria-controls</pref>.
+          <a>User agents</a> and <a>assistive technologies</a> SHOULD continue to support the ARIA 1.0 pattern so that existing implementations of the ARIA 1.0 pattern remain functional.
+          However, conformance checkers SHOULD recommend that authors convert to the ARIA 1.2 pattern by replacing <pref>aria-owns</pref> with <pref>aria-controls</pref>.
+        </p>
+        <p>
+          The ARIA 1.1 specification describes a <code>combobox</code> pattern where the element with role <code>combobox</code> is a composite container instead of a focusable input.
+          <a>User agents</a> and <a>assistive technologies</a> did not adequately support the ARIA 1.1 pattern, so the ARIA 1.2 pattern supersedes the ARIA 1.1 pattern.
+          Authors SHOULD convert implementations of the ARIA 1.1 pattern to the ARIA 1.2 pattern.
+          Conformance checkers SHOULD warn authors that the ARIA 1.1 pattern is no longer valid.
+          User agents and assistive technologies MAY phase out support for the ARIA 1.1 pattern at their own discretion.
+        </p>
+        <p>The features and behaviors of combobox implementations vary widely. Consequently, there are many important authoring considerations. See the <cite><a href="" class="practices"><abbr title="Accessible Rich Internet Applications">WAI-ARIA</abbr> Authoring Practices</a></cite> for additional details on implementing combobox design patterns.</p>      
+      </div>
 			<table class="role-features">
 				<caption>Characteristics:</caption>
 				<thead>