How to know if a book is epub2 or epub3

ldmobi · 09-15-2019, 08:26 AM

I'm trying to find a way to check which version of Epub is a book.

Ideally I would like to filter by pub version, but it would be very useful even just to inspect the pub version of a book.

Is there anything I can do to know the pub version?

kovidgoyal · 09-15-2019, 09:11 AM

Open it in Edit book and then open the opf file the ackage version will be near the top of that.

ldmobi · 09-15-2019, 09:46 AM

Thanks!

enuddleyarbl · 07-17-2022, 10:29 AM

Is there any way to filter on the epub version at the overall Calibre library page level? I'm slowly converting everything to epub3 and it would make things easier if I could filter out the books I've already done. The best I've been able to come up with is to set up a custom column and populate it as I go. But, something like format:epub3 would be convenient (edit: well, actually something to show NOT epub3 -- those are the ones I'd still have to do).

chaley · 07-17-2022, 10:34 AM

Quote:

Originally Posted by DaveLessnau

Is there any way to filter on the epub version at the overall Calibre library page level? I'm slowly converting everything to epub3 and it would make things easier if I could filter out the books I've already done. The best I've been able to come up with is to set up a custom column and populate it as I go. But, something like format:epub3 would be convenient.

There was a thread about this: https://www.mobileread.com/forums/sh...d.php?t=347322.

I don't know if the OP tried it, and if so how well it worked.

Wiggo · 07-17-2022, 12:01 PM

I’m not OP, but it helped

Quality check Plugin: Search EPUBS with search term version="3.0"

enuddleyarbl · 07-17-2022, 01:43 PM

Quote:

Originally Posted by Wiggo

I’m not OP, but it helped

Quality check Plugin: Search EPUBS with search term version="3.0"

I even have that PI already installed. I had to select the "OPF Manifest" box to get it to find them, though. And, by searching for version="2.0", I can find the books I haven't converted yet.

Thanks.

JSWolf · 07-17-2022, 01:46 PM

Quote:

Originally Posted by DaveLessnau

I even have that PI already installed. I had to select the "OPF Manifest" box to get it to find them, though. And, by searching for version="2.0", I can find the books I haven't converted yet.

Thanks.

Why do you want to convert ePub 2 to ePub 3? What do you get out of it?

enuddleyarbl · 07-17-2022, 03:07 PM

Quote:

Originally Posted by JSWolf

Why do you want to convert ePub 2 to ePub 3? What do you get out of it?

I'm converting just for grins. It's not like I lose anything. And after 10 years or so since its adoption, I figured it's about time.

DNSB · 07-17-2022, 03:17 PM

For what it's worth, I have converted some epub2 books to epub3 to allow better use of accessibility features. The books are used with a voice reader program for visually impaired users which makes use of quite a few epub3 accessibility options such as using a <hr/> to give an audible indicator of a scene break. For me, it was a learning project, for the users, it made their listening experience a bit more enjoyable.

09-15-2019, 08:26 AM	#1
ldmobi Enthusiast Posts: 27 Karma: 10 Join Date: Jan 2018 Device: none	How to know if a book is epub2 or epub3 I'm trying to find a way to check which version of Epub is a book. Ideally I would like to filter by pub version, but it would be very useful even just to inspect the pub version of a book. Is there anything I can do to know the pub version?

07-17-2022, 10:29 AM	#4
enuddleyarbl Guru Posts: 768 Karma: 1537886 Join Date: Sep 2013 Device: Kobo Forma	Is there any way to filter on the epub version at the overall Calibre library page level? I'm slowly converting everything to epub3 and it would make things easier if I could filter out the books I've already done. The best I've been able to come up with is to set up a custom column and populate it as I go. But, something like format:epub3 would be convenient (edit: well, actually something to show NOT epub3 -- those are the ones I'd still have to do). Last edited by enuddleyarbl; 07-17-2022 at 10:32 AM.

07-17-2022, 12:01 PM	#6
Wiggo Leftutti Posts: 549 Karma: 1717097 Join Date: Feb 2019 Location: Bavaria Device: iPad Pro, Kobo Libra 2	I’m not OP, but it helped Quality check Plugin: Search EPUBS with search term version="3.0" Last edited by Wiggo; 07-17-2022 at 12:01 PM. Reason: Typo

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09-15-2019, 09:11 AM	#2
kovidgoyal creator of calibre Posts: 45,118 Karma: 27110892 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Open it in Edit book and then open the opf file the ackage version will be near the top of that.

09-15-2019, 09:46 AM	#3
ldmobi Enthusiast Posts: 27 Karma: 10 Join Date: Jan 2018 Device: none	Thanks!

07-17-2022, 03:17 PM	#10
DNSB Bibliophagist Posts: 44,187 Karma: 165572332 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	For what it's worth, I have converted some epub2 books to epub3 to allow better use of accessibility features. The books are used with a voice reader program for visually impaired users which makes use of quite a few epub3 accessibility options such as using a <hr/> to give an audible indicator of a scene break. For me, it was a learning project, for the users, it made their listening experience a bit more enjoyable.

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