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Perhaps someone can enlighten me as to the raison d'etre for EPUB3?
The utility of EPUB2 is easy to grasp: define a subset of HTML4 so that books can be displayed on devices with limited features.
With EPUB3, it seems like more or less all of HTML5 is supported, giving the possibility of all-singing, all-dancing e-books. But what is then the point of wrapping another format around HTML5? Why not just keep your document as just an HTML file and have one less standard to comply with?
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