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Originally Posted by DNSB
Minor nits. Epubcheck will pass an epub2 as easily as an epub3. Both versions are supported -- somebody had to use the version information.  |
The point is that you can use EPUB 3 features in EPUB 2 books (the HTML/CSS/javascript features in particular) and they will work everywhere that EPUB 3 will work, except that epubcheck will complain about them.
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As for rendering epub2 vs. epub3, there may be a renderer that handles both versions properly but I haven't found it yet. Likely the reason that Kobo uses two renderers with the software for their eInk devices.
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Really, there are epub 3 renderers that do not render epub 2? If so, please point me to one. IIRC the reason Kobo does that has nothing to do with epub 3 they split their renderers long before epub 3, to support kepub.