: Re: Command line extraction of metadata (title. author) from epub file I would like to use a command line to extract the title of a book (possibly also other metadata) from its epub file and return

@Angie

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An EPUB file is just a zip file, and the book's metadata is contained in the OPF (Open Packaging Format) file, which is an XML file. The title is located in the /package/metadata/dc:title element. The other info you're looking for is probably also in children of the metadata element. Here's a good intro to the EPUB format: www.ibm.com/developerworks/xml/tutorials/x-epubtut/.
I'm not very familiar with Linux, so I don't know exactly how you'd do all this from the command line. I suspect it would involve writing or finding a script that would uncompress or dig around in the EPUB file, find the OPF file, parse its XML, and locate the element with the metadata you specify, perhaps using XPath.

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