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Originally Posted by Sarmat89
Yet it does support the random access with 4KB granularity, and indices with morphology support. None of those are in EPUB 2 or 3.
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The 4K block size is a remnant from PalmDoc where text was stored in 4096 byte blocks. If you find this functionality important enough to mention, supplying an example where this would be more useful than an index or searching should be simple enough. As for the indices with morphology support? A nice buzz phrase. I seem to have seen several scholarly epub and pdf ebooks with indices offering similar functionality.
Quote:
Originally Posted by Sarmat89
...if the file was converted from EPUB in the first place, and stored inside.
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Oddly, in the 278 books I've purchased from Amazon in the last couple of years, the only one that was not unpackable to epub was an AZW wrapper around a PDF. Given that several of the books showed sources such as docx and rtf, I would suspect that either AZW3 is a lot closer to epub than most people assume or that Amazon converts to epub on the way to generating an AZW3.