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Basilicum · 12-25-2017, 07:09 AM

I would like to have an unique number that identifies the book object, rather than relying on title or author that can change.

I found the calibre_id, but not sure this id will survice database replication, splitting and merging. This one seems not to fullful my requirements.

There is also a UUID in the OPF file, but I couildn't find any information who issues this UUID and when. Maybe I could use this one. Can anyone tell me:
is the UUID always generated when a book is created ?
is the UUID never changed ?

Is the OPF file always present ?

thnaks , Basilicum

12-25-2017, 07:09 AM	#1
Basilicum Junior Member Posts: 4 Karma: 10 Join Date: Jun 2012 Device: none	identifying Calibre books I would like to have an unique number that identifies the book object, rather than relying on title or author that can change. I found the calibre_id, but not sure this id will survice database replication, splitting and merging. This one seems not to fullful my requirements. There is also a UUID in the OPF file, but I couildn't find any information who issues this UUID and when. Maybe I could use this one. Can anyone tell me: is the UUID always generated when a book is created ? is the UUID never changed ? Is the OPF file always present ? thnaks , Basilicum