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What is metadata.opf for?
The books usually comes in a folder that contain three files.
The .epub, a cover .jpg and a metadata.opf.
The .epud by itself seem to work just fine in my readers without metadata.opf and I don't use cover image.
WHat is the purpose of metadata.opf? Can I just delete them and store all my books in just epud, so that each book do not need to have it's own folder.
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