It’s unfortunately too easy when moving from a visual medium like print to treat digital content as nothing more than yet another display medium, however. The simple path is to graft what you know onto what you don’t. But it’s that thinking that perpetuates the inaccessibility of content. Everything starts with the source. All the bells and whistles your reading system can do for you to assist in rendering and playback ultimately rely on the value of the content underneath and the ability to make sense of it.
This is so important. Right now most publishing workflows just output digital as if it were purely display oriented: paperback, hardback, PDF, EPUB. But assistive technologies aren't psychic; they need described and modeled data to work correctly.
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