Quote:
Originally Posted by JSWolf
My question, is what ePub 3 compatible programs/apps use any of the features of ePub 3 in a backwards compatible epUb 3?
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The answer is "all of them". Epub3 engines render Epub3s using epub3 specifications. And commercially sold epub3s comply with the epub3 specifications (or as close as commercially sold epub2s comply with the epub2 specs, anyway). Your insistence that the commercial epub3s being sold today are some sort of special hybrid format intended to work on older devices is misguided. They are full-blown epub3 books with an optional ncx file added. The fact that they're primarily text-only, reflowable books is neither here nor there. The vast majority of ebooks being
sold are text-only, reflowable books.