metadata.opf updated for no reason

wolverine · 11-24-2021, 12:24 AM

I am on Calibre 5.32. I noticed that a few books got updated to the most recent date.

I opened the folder for the book entry and the metadata.opf file has the most recent date. The epub and jpg date properties is the date that book was entered into Calibre.

I am certain that I did not update the metadata or opened the book in Calibre viewer today.

What would cause the metadata.opf file to get updated to most recent date?

wolverine · 11-24-2021, 02:04 AM

I compared the metadata.opf file with a backup that I took last week.

Both opf file has identical content.

Karellen · 11-24-2021, 02:07 AM

Did you eyeball the changes or did you run it through a diff checker

Try... https://www.diffchecker.com/

theducks · 11-24-2021, 11:27 AM

Those files can have a CaSe ChaNge
caused by any book updating a Tag or Author or Publisher case
Calibre uses a Relational Database structure. Things are define ONCE and Linked to each usage.

Those a BACKUP file for the current metadata.db (Your Library spreadsheet) entry. The book is not updated within the Library unless you take other steps.

BetterRed · 11-24-2021, 02:58 PM

@wolverine - see ==>> Calibre randomly changes date of metadata.opf files of books I haven't edited

BR

wolverine · 11-25-2021, 02:18 AM

In one of the books where I did not touch the metadata or opened the book, the MODIFIED was updated to today.

When I compare the OPF of this book to another Calibre backup, the difference was "calibre (5.32.0)" vs "calibre (5.28.0)" in my backup

=================================================

<dc:contributor opf:file-as="calibre" opf:role="bkp">calibre (5.32.0) [https://calibre-ebook.com]</dc:contributor>
<dc:date>2014-06-20T07:00:00+00:00</dc:date>

=================================================

What causes the OPF to be updated with the CONTRIBUTOR to be updated with the current version of Calibre that I am running.

kovidgoyal · 11-25-2021, 02:54 AM

The OPF files are not for use by anyone other than calibre. Why they are updated or when or for what purpose is nobody's business other than calibre.

To repeat: The OPF files are an internal backup mechanism calibre uses. Pretend they dont exist.

11-24-2021, 12:24 AM	#1
wolverine Junior Member Posts: 3 Karma: 10 Join Date: Apr 2013 Device: Kindle Paperwhite	metadata.opf updated for no reason I am on Calibre 5.32. I noticed that a few books got updated to the most recent date. I opened the folder for the book entry and the metadata.opf file has the most recent date. The epub and jpg date properties is the date that book was entered into Calibre. I am certain that I did not update the metadata or opened the book in Calibre viewer today. What would cause the metadata.opf file to get updated to most recent date?

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11-24-2021, 02:04 AM	#2
wolverine Junior Member Posts: 3 Karma: 10 Join Date: Apr 2013 Device: Kindle Paperwhite	I compared the metadata.opf file with a backup that I took last week. Both opf file has identical content.

11-24-2021, 02:07 AM	#3
Karellen Wizard Posts: 1,611 Karma: 9500498 Join Date: Sep 2021 Location: Australia Device: Kobo Libra 2	Did you eyeball the changes or did you run it through a diff checker Try... https://www.diffchecker.com/

11-24-2021, 11:27 AM	#4
theducks Well trained by Cats Posts: 31,054 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Those files can have a CaSe ChaNge caused by any book updating a Tag or Author or Publisher case Calibre uses a Relational Database structure. Things are define ONCE and Linked to each usage. Those a BACKUP file for the current metadata.db (Your Library spreadsheet) entry. The book is not updated within the Library unless you take other steps.

11-24-2021, 02:58 PM	#5
BetterRed null operator (he/him) Posts: 21,725 Karma: 29711016 Join Date: Mar 2012 Location: Sydney Australia Device: none	@wolverine - see ==>> Calibre randomly changes date of metadata.opf files of books I haven't edited BR

11-25-2021, 02:18 AM	#6
wolverine Junior Member Posts: 3 Karma: 10 Join Date: Apr 2013 Device: Kindle Paperwhite	In one of the books where I did not touch the metadata or opened the book, the MODIFIED was updated to today. When I compare the OPF of this book to another Calibre backup, the difference was "calibre (5.32.0)" vs "calibre (5.28.0)" in my backup ================================================= <dc:contributor opf:file-as="calibre" opf:role="bkp">calibre (5.32.0) [https://calibre-ebook.com]</dc:contributor> <dc:date>2014-06-20T07:00:00+00:00</dc:date> ================================================= What causes the OPF to be updated with the CONTRIBUTOR to be updated with the current version of Calibre that I am running.

11-25-2021, 02:54 AM	#7
kovidgoyal creator of calibre Posts: 45,347 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The OPF files are not for use by anyone other than calibre. Why they are updated or when or for what purpose is nobody's business other than calibre. To repeat: The OPF files are an internal backup mechanism calibre uses. Pretend they dont exist.

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