Quote:
Originally Posted by JSWolf
@Quoth, Amazon does not call Mobi KF7. At least not that I've ever seen.
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Did I claim they did?
Actually there are a few different formats that are used in .mobi files, but KF7 (Kindle Format 7) is the basic ebook format similar to .prc and .azw is usually a more or later encrypted version. Amazon bought in mobipocket two years before they released the Kindle. I've no idea if there is KF6 or KF9. I presume the more encrypted annoying KFX means Kindle Format 10.
As well as the basic reflowable HTML based KF7, there are interactive mobi files and fixed layout format mobi files. I think azw3 has two common formats, the KF8 which is similar to epub2 and a version of PDF (fixed layout).
IMO "real" ebooks are never fixed layout, always have pages, but the the text flows to fit no matter font size, are not interactive and the only content presented is text and images. Images to have no animation or transparency. No overlapping text / images. Basically a way of consuming books on a paged electronic screen. I do think that it's a shame that a browser can't treat the window/screen as user defined "paper size" and paginate like for a printer. If you define a paper size to match the browser window size and select Print Preview (on browers/OS that support it) you can almost get an ebook experience in a browser as all transparency, animation and interactive features are gone.
No surprise that ebooks migrated to HTML in early 2000s and soon added CSS. The Kindle was late to the ebook party and later still to CSS party.
Sony upgraded from LRF to ePub. Amazon should have done the same, but they had previously fallen out with Adobe over encryption costs.