Addition to IER for 1.1.3 Browse and Render

How about adding something like this to the Intent for 1.1.3 Browse and Render:

"Note: Although it is not required, user agents are also encouraged to let the user replace time-based media with their alternatives (e.g. replacing a video with its transcript) or supplement non-time-based media with their alternatives (e.g. displaying alternative text or long description beneath an image)."

     Greg