Quote:
Originally Posted by FunkeXMix
Personally I wish this was not necessary for iBooks publishing. I mean, if you make a fashion type eBook with lots of images. Visually impaired readers who need alt tags are not even consumers of this type of eBook.
It's just a pointless time consuming addition to the production flow for some type of eBooks.
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It's not an iBooks requirement, it's an XHTML requirement, and ePub requires (sort of) valid XHTML.
As I said above, and as you repeat in your post,
alt="" is perfectly valid and recommended in decorative images. But sometimes images are not just decorative, they may be a sample of hand-written text, a strange symbol, or even an illustration that's closely linked to the text ("and this is what he found when he opened the door: [here comes an illustration]"). For those cases you need to provide something meaningful in the alt attribute. For the rest, just use alt="". Apple is not requiring anything new, but they may be providing bad examples.