Thread: Polish Books does not include identifiers
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Old 10-10-2013, 10:44 PM   #2
kovidgoyal
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IIRC, updating metadata in epub has never supported writing identifiers other than isbn, this comes from the difficulty caused by the fact that identifiers in epub can also be package unique identifiers, therefore changing them can cause side-effects if one is not careful. Probably something that can be implemented with enough care.
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