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I think an additional example that addresses the needs of users of voice activation technology such as Dragon Speaking Naturally should be included. Many web authors do not know that the alt text should exactly match the words on the image for a button or link. If the text on the image is "Buy Now" and the alt text is something like "Go to the store" the Dragon user will never get the button activated by speaking the text that is displayed and will have to resort to the much slower method of selecting the quadrant.
EDITOR'S RESPONSE: This is an Editor's Response to your comment. If you are satisfied with this response, please change the state of this bug to CLOSED. If you have additional information and would like the editor to reconsider, please reopen this bug. If you would like to escalate the issue to the full HTML Working Group, please add the TrackerRequest keyword to this bug, and suggest title and text for the tracker issue; or you may create a tracker issue yourself, if you are able to do so. For more details, see this document: http://dev.w3.org/html5/decision-policy/decision-policy.html Status: accepted Change Description: add information prertaining to the prvosion of exact represenations of visible text in alt text for buttons and images used as the sole content of a l;ink. Rationale: agree that this is an important consideration.