UUID in Catalog csv

beachbunny · 12-22-2025, 11:29 PM

When I create a catalog of my library ...I notice that UUID is taken from the metadata.opf file found in the books directory. Is there a report or flag I can set to read the UUID from the Epub file itself.

I would like to utilize the field to match up files I have collected off of sights like Smashwords and imported them to Calibre. I can write a script to generate a report and traverse the directory structure collecting metadata using exiftool .. though if there is something in Calibre already I would not need to go down that path. My library is large, over 4k books to date.

kovidgoyal · 12-23-2025, 01:52 AM

The uuid is the internal uuid per book that calibre uses. A book can have more than just an EPUB format hence using UUIDs from a particualr format doesnt make sense.

beachbunny · 12-23-2025, 01:49 PM

Quote:

Originally Posted by kovidgoyal

The uuid is the internal uuid per book that calibre uses. A book can have more than just an EPUB format hence using UUIDs from a particualr format doesnt make sense.

Thanks ... it was just a thought I had. I understand how you are using it and why.

Thanks for all your work Kovid.

12-22-2025, 11:29 PM	#1
beachbunny Member Posts: 15 Karma: 10 Join Date: Jul 2011 Device: kobo wifi, touch & sage, Nexus 7 & 9	UUID in Catalog csv When I create a catalog of my library ...I notice that UUID is taken from the metadata.opf file found in the books directory. Is there a report or flag I can set to read the UUID from the Epub file itself. I would like to utilize the field to match up files I have collected off of sights like Smashwords and imported them to Calibre. I can write a script to generate a report and traverse the directory structure collecting metadata using exiftool .. though if there is something in Calibre already I would not need to go down that path. My library is large, over 4k books to date.

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12-23-2025, 01:52 AM	#2
kovidgoyal creator of calibre Posts: 45,729 Karma: 28549306 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The uuid is the internal uuid per book that calibre uses. A book can have more than just an EPUB format hence using UUIDs from a particualr format doesnt make sense.

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