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#1 |
Connoisseur
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Karma: 10
Join Date: Mar 2014
Device: iPhone XR
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EPUB 2 vs. 3 ??
I've been seeing notes on new features in calibre to convert from EPUB v2 to v3. Which leads me to ask--when I convert a Kindle book to EPUB, which version is created? And why would I want to convert a book from EPUB v2 to v3?
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#2 | |
Grand Sorcerer
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Karma: 16539642
Join Date: Sep 2009
Location: UK
Device: ClaraHD, Forma, Libra2, Clara2E, LibraCol, PBTouchHD3
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I'd say it's one of those self-answering questions. If you don't know why you need EPUB3, you probably don't need it. ![]() |
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#3 |
creator of calibre
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Karma: 27110894
Join Date: Oct 2006
Location: Mumbai, India
Device: Various
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The only people that really need EPUB 3 are people that want to create EPUBs that have to pass epubcheck. Passing epubcheck is meaningless, but unfortunately some EPUB stores require it so people that want to sell books in those stores need it.
Other than that pretty much everything you can do in EPUB 3 you can do in EPUB 2, because both are ultimately rendered using the same browser engines. |
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#4 | |
Bibliophagist
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Karma: 168808777
Join Date: Jul 2010
Location: Vancouver
Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos
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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. The only epub3 books I've found that really needed to be epub3 are either displaying languages that don't read RTL, top to bottom (Japanese vertical with furigana as an example) or are using fixed layout. Last edited by DNSB; 05-04-2018 at 10:35 PM. |
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#5 | ||
creator of calibre
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Karma: 27110894
Join Date: Oct 2006
Location: Mumbai, India
Device: Various
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Last edited by kovidgoyal; 05-04-2018 at 10:59 PM. |
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#6 | ||
Bibliophagist
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Karma: 168808777
Join Date: Jul 2010
Location: Vancouver
Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos
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As for epub3 renderers that don't support epub2? The question for me is not if they support epub2 but if they support it to the point where I can't tell if I have an epub2 or an epub3 ebook open in calibre's ebook viewer, Datalogics DLReader, Edge, ADE4, Azardi, Readium, BlueFire and ghod alone knows how many others I've tried on my Windows desktop or in RMSDK and ACCESS on my Kobo ereaders. Some come very close but there are items that don't render the same and I find those annoying much as I find applications that do not follow the epub stylesheet(s) to be annoying. But then I also find Adobe's inability to support small caps as annoying. Every now and then, I get enthused and try the epub3 test suite just to see how much has changed. Last time through, I added "Harry Potter: A Journey Through a History of Magic" from the British Library as a real word fixed layout epub3 (aka pdf for epub users). Looks great on my Kobo after being renamed to .fxl.kepub.epub (uses the ACCESS renderer in FLO mode), Edge opened it in a two page layout which looked good. Readium for Chrome insisted on unpacking the file but did a nice 1 page view. Most of the other applications I tested strove to look ugly at best. Last edited by DNSB; 05-05-2018 at 12:01 AM. |
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#7 | |
Grand Sorcerer
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Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
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#8 | |
Bibliophagist
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Karma: 168808777
Join Date: Jul 2010
Location: Vancouver
Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos
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#9 |
Connoisseur
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Karma: 10
Join Date: Mar 2014
Device: iPhone XR
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Thanks to all for the helpful info!
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