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Thanks a lot for taking time to answer me. It seems I'm not clear enough. My problem has nothing to do with metadata download from ISBN value.
I'm editing PDF and epub outside calibre. When one epub or PDF is modified I have to delete the old in calibre and import the new one. So I would like that all metadata from the new PDF to be automatically reimported in calibre (tag, author and so on)
In epub i write, I use ISBN to store a version number this way the ISBN from my epub is recognized in calibre. And it works.
Is there a solution for calibre to do the same as there is no official metadata for ISBN in PDF ?
I'm missing a documentation on how calibre import metadata from PDF in calibre.
And on internet everyone is interested in calibre to write metadata in PDF from calibre metadata whereas I want to do exactly the opposite: configure the way calibre import metadata from a PDF...
Am I more understandable ?
Regards
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