MobileRead Forums
Register Guidelines E-Books Today's Posts Search

Go Back   MobileRead Forums > E-Book Software > Calibre > Library Management
Reload this Page What is the OPF file

Notices

Reply
 
Thread Tools Search this Thread
Old 07-07-2013, 08:05 PM   #1
HFC3
Enthusiast
HFC3 began at the beginning.
 
Posts: 30
Karma: 10
Join Date: Apr 2013
Device: Kindle Touch
[SOLVED] What is the OPF file
Playing around with the save to disk template and I see that there is an OPF file that is saved as well as the cover and book.

What is that file? And, why is it needed when saving to disk?

Just curious

Thanks again

Harry
Last edited by HFC3; 07-07-2013 at 11:43 PM.
HFC3 is offline   Reply With Quote
Old 07-07-2013, 08:27 PM   #2
BetterRed
null operator (he/him)
BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.BetterRed ought to be getting tired of karma fortunes by now.
 
Posts: 21,681
Karma: 29711016
Join Date: Mar 2012
Location: Sydney Australia
Device: none
Quote:
Originally Posted by HFC3 View Post
Playing around with the save to disk template and I see that there is an OPF file that is saved as well as the cover and book.

What is that file?
OPF stands for Open Packaging Format. The Open Packaging Format is a standard that is a part of the EPUB eBook specification. The OPF files store information for an associated eBook including the title of the eBook, the eBook language, creator, reading order and book ID. The OPF file is included in the EPUB archive to specify the metadata of the associated eBook. The OPF files are saved in XML format.

Calibre puts all the metadata into the OFP, including non-standard items (eg series) and custom column items.

Quote:
Originally Posted by HFC3 View Post
And, why is it needed when saving to disk?
I'm not sure why its needed when saving to disk, but that could also be said of the cover. For completeness sake I would think.

You can eyeball the OPF with a text editor (if you use something like Notepad++ it will look pretty), and because its XML its relatively easy to read it within a program.

The OPF files are 'needed' in the library folder to provide a means of restoring the library metadata database should it get damaged or lost.

BR
BetterRed is offline   Reply With Quote
Advert
Old 07-08-2013, 02:31 AM   #3
itimpi
Wizard
itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.itimpi ought to be getting tired of karma fortunes by now.
 
Posts: 4,553
Karma: 950151
Join Date: Nov 2008
Device: Sony PRS-950, iphone/ipad (Marvin/iBooks/QuickReader)
The .opf file and cover image files are optional when using the Save to Disk feature. They are included by default as not all eBook formats allow the information to be embedded in the eBook itself.
itimpi is offline   Reply With Quote
Old 07-08-2013, 05:15 AM   #4
DoctorOhh
US Navy, Retired
DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.DoctorOhh ought to be getting tired of karma fortunes by now.
 
DoctorOhh's Avatar
 
Posts: 9,896
Karma: 13806776
Join Date: Feb 2009
Location: North Carolina
Device: Icarus Illumina XL HD, Kindle PaperWhite SE 11th Gen
Quote:
Originally Posted by HFC3 View Post
What is that file?
The .opf files you see in the calibre library are for database disaster recovery in case of corruption of the metadata.db database.
DoctorOhh is offline   Reply With Quote
Reply

« Previous Thread | Next Thread »

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
[Old Thread] What's an OPF file? Anarel Calibre 8 03-28-2016 05:17 PM
'Missing OPF package File' NewbDummy Library Management 9 11-04-2012 02:48 AM
TWO OPF files or something like Media Queries in the OPF file for KF8 and MOBI? DHahn Kindle Formats 3 04-17-2012 04:06 AM
opf file iomari Calibre 10 09-23-2011 01:28 AM
OPF file OPS/package.opf is missing Run2Eat ePub 2 05-31-2011 06:52 PM


All times are GMT -4. The time now is 07:50 AM.

Contact Us - FAQ - Guidelines - Privacy - Top

MobileRead.com is a privately owned, operated and funded community.