Originally Posted by Jellby
Meaning that reading systems are not required to support it, and they still can call themselves ePub-compliant.
But we have reading systems that do not support "required" features, and they call themselves ePub-readers, so I don't think anyone cares much.
And the only thing I ever care about is: does it actually WORK
? We long ago gave up trying to "please" all devices; it's simply not possible. But we go for the biggies--Amazon, Nook & iBooks, along with Kobo and Sony. After that, we can't manage; too many devices with too many weirdnesses (and don't get me started about reading apps, particularly on iPad and Droid tabs/phones!).