Other questions that authors may be asking are:
Which browsers support these features? Which don't? There are also other issues with backward compatibility. We require that pages transform gracefully across browsers, but how can one author test all possible browser and user scenarios?
Please see User Agent Support for Accessibility. This page documents user agent support for accessibility features discussed in WCAG 1.0.
To Checkpoints for Guideline 11.
Next slide: Example for Checkpoint 11.2