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Originally Posted by Solo1959
I have created several epubs in Calibre by converting from .txt, .docx, .odt, etc. I was having a problem with one of them so for the first time I right-clicked on the book to edit the book with Calibre. This is new to me.
When I looked at my book, I noticed this:
<dc:identifier id="uuid_id" opf:scheme="uuid">f272b91c-0459-4081-99a8-5cd790d5e618</dc:identifier>
<dc:identifier opf:scheme="calibre">f272b91c-0459-4081-99a8-5cd790d5e618</dc:identifier>
I don't know what those two lines mean. They must have been added during the conversion process. I deleted them form the book using the edit book function of Calibre, and the book reads exactly the same with no changes. I looked at my other epubs and noticed they all had similar lines.
What do these lines mean? What do they do? Is it safe to keep them in the book? Should I remove them from every book?
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Quote:
Originally Posted by dwig
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Quote:
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Originally Posted by theducks
But only if you are distributing them. (Or sync between devices)
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So I guess I should keep them in. They could be needed if I open the ebook in two different devices and want them to be synchronized between the two devices. In that case they would be required. I think I get it. It's a unique identifier so the devices know what ebook I am reading and this is more accurate than the title and author because it includes all of the other formatting information.
Thank you.