Chapter 1. What Is EPUB 3?

EPUB 3 in a Nutshell

So what exactly is an EPUB? If you follow electronic publishing at all, you’ve undoubtedly run into the term, but you may have seen or heard it incorrectly being used as a synonym for “ebook”—as a shorthand for talking about electronic books. Although the two terms share a common relation in electronic book production, they aren’t interchangeable. EPUB, as we’re here to discover, is a format for representing documents in electronic form. “Ebook,” on the other hand, is just an abstract term used to encompass any electronic representation of a book, and includes formats such as PDF, HTML, ASCII text, Word, and a host of others, in addition to EPUB.

Like “ebook,” the EPUB name comes ...

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