Quote:
Originally Posted by murraypaul
If you restrict to using only some features, the book may open in some ePub readers. That doesn't mean that the book is valid ePub, only that the reader accepts it, and it certainly doesn't mean that a book using all features would be.
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Quote:
Originally Posted by Sil_liS
Don't you have the same relation between .doc and .docx?
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I don't think the relationship between .iBooks and EPUB is similar to that between .doc and docx. The .doc format is a binary format while the .docx format (per Wikipedia) is basically a zipped XML file (to me it sounds similar to the OpenDocument format).
Based on what I've read in this thread, it sounds to me that the iBooks format and EPUB are like two different version of HTML, where one version (iBooks) has added non-standard tags to the basic format (EPUB). While an EPUB reader might be able to view an ebook with the added tags it might not render the ebook correctly or as intended. If I'm wrong on this, please correct me.