Quote:
Originally Posted by KevinH
3. disable their inclusion if an audio or video resource is present in the opf since that would invalidate the extra metadata. Or is there special metadata entries for these cases?
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There are
special tags, but I don't know if all screen readers support them.
Quote:
Originally Posted by KevinH
4. disable their inclusion if mathml tags are found (is this needed? Can text readers grok mathml?)
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There is also a
special aria attribute to describe MathML, but I don't know if all screen readers support it. Also the existing epub 3.0.1 standard requires an epub:switch element while the epub 3.1 standard removed this element.
IMHO, default accessibility attributes/metadata entries should only be added if a book doesn't contain JavaScript, MathML or multimedia files.
(I agree with all your other suggestions.)