Sigil Metadata

Heather O'Sull · 08-30-2023, 05:15 PM

Back in the mists of time (probably about 10 years ago), I remember that editing an epub in Sigil resulted in Sigil adding some of its own fields to the metadata. I've been reviewing epubs edited with recent versions of Sigil, and I don't seem to see this happening anymore. Can anyone confirm (or deny) this? I know that what I really need to do is a line by line before and after code comparison, and I will do it soon, but I don't have time right now. Thanks

KevinH · 08-30-2023, 05:32 PM

The only thing Sigil ever added to the metadata that was not required by the epub spec was Sigil Version information that was being used.

The updating of the modification date is actually required by the epub spec to work with the unique identifier to uniquely identify an epub release.

There is an environment variable you can set to disable the adding of the Sigil version. But many petty Linux distributions disable it by default for no truly valid reason.

Sad really.

They use an open source tool to help them produce something but want to provide it no credit.

Heather O'Sull · 08-30-2023, 08:47 PM

Thanks Kevin - this is super helpful. If that's the only tag, I have no problem with it remaining in. For some reason I thought I recalled it adding more bits and pieces, but as I say it was a lot of years ago and sometimes I can't recall what I ate for breakfast.

Thanks again for your reply!

Quote:

Originally Posted by KevinH

The only thing Sigil ever added to the metadata that was not required by the epub spec was Sigil Version information that was being used.

The updating of the modification date is actually required by the epub spec to work with the unique identifier to uniquely identify an epub release.

There is an environment variable you can set to disable the adding of the Sigil version. But many petty Linux distributions disable it by default for no truly valid reason.

Sad really.

They use an open source tool to help them produce something but want to provide it no credit.

Turtle91 · 08-30-2023, 10:18 PM

You may be thinking of Calibre which adds a few more tags. Not too many, but a few.

08-30-2023, 05:15 PM	#1
Heather O'Sull Junior Member Posts: 2 Karma: 10 Join Date: Aug 2023 Device: none	Sigil Metadata Back in the mists of time (probably about 10 years ago), I remember that editing an epub in Sigil resulted in Sigil adding some of its own fields to the metadata. I've been reviewing epubs edited with recent versions of Sigil, and I don't seem to see this happening anymore. Can anyone confirm (or deny) this? I know that what I really need to do is a line by line before and after code comparison, and I will do it soon, but I don't have time right now. Thanks

08-30-2023, 05:32 PM	#2
KevinH Sigil Developer Posts: 9,072 Karma: 6361556 Join Date: Nov 2009 Device: many	The only thing Sigil ever added to the metadata that was not required by the epub spec was Sigil Version information that was being used. The updating of the modification date is actually required by the epub spec to work with the unique identifier to uniquely identify an epub release. There is an environment variable you can set to disable the adding of the Sigil version. But many petty Linux distributions disable it by default for no truly valid reason. Sad really. They use an open source tool to help them produce something but want to provide it no credit. Last edited by KevinH; 08-30-2023 at 07:25 PM.

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08-30-2023, 10:18 PM	#4
Turtle91 A Hairy Wizard Posts: 3,397 Karma: 20212733 Join Date: Dec 2012 Location: Charleston, SC today Device: iPhone 15/11/X/6/iPad 1,2,Air & Air Pro/Surface Pro/Kindle PW & Fire	You may be thinking of Calibre which adds a few more tags. Not too many, but a few.