2.4.6-headings-and-labels-descriptive-icons

understanding/20/headings-and-labels.html

@@ -30,6 +30,9 @@ <h2>Intent of Headings and Labels</h2>
       <p>Labels and headings do not need to be lengthy. A word, or even a single character,
          may suffice if it provides an appropriate cue to finding and navigating content.
       </p>
+       <p>Labels of form controls are usually text-based. In some cases, images can serve as descriptive label without additional text. In these cases, authors should ensure that the image and its use as label in a particular context can be considered conventional and widely understood. 
+         Note that the same icon can be interpreted differently in different contexts and still be considered descriptive in that context. For example, placed after a search field, a magnifying glass icon is commonly interpreted as triggering a search. 
+         Placed on an image, a magnifying glass icon is commonly interpreted as opening a magnified version of the image (or zooming into that image).</p>
 
       <p>This Success Criterion does not require headings or labels. This Success Criterion
          requires that if headings or labels are provided, they be descriptive. This Success Criterion also
@@ -93,6 +96,9 @@ <h2>Examples of Headings and Labels</h2>
          <dt>A form asking for the name of the user</dt>
          <dd>A form asks for the name of the user. It consists of two input fields to ask for the first
                and last name. The first field is labeled <q>First name</q>, the second is labeled <q>Last name</q>.</dd>
+         <dt>A search field labeled by a magnifying glass icon</dt>
+         <dd>A search text input is followed by a button containing a magnifying glass icon that activates the search function. 
+               The icon has the string "search" as programmatically determinable label.</dd>
       </dl>
 
    </section>