Quote:
Originally Posted by Points
What exactly is the metadata.opf file, and how does it compare to content.opf?
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As theducks stated the metadata.opf file and the content.opf file don't have anything to do with one another. The metadata.opf is strictly a database recovery tool in case of a corrupted library.
Quote:
Originally Posted by Points
It seems to have metadata that could go in content.opf, and that I assumed would be there when I entered it in calibre
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The metadata you add to calibre is inserted in the book when the book is exported from calibre's library. Send to device and Save to disk are two methods for exporting books from the calibre library. When exporting using these methods the metadata is embedded in the book and the content.opf file is updated in the exported book.
Good Reading.