Quote:
Originally Posted by heySkippy
Apparently it's neither. Looks like it's using HTML5 and Javascript.
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That's the basis of the ePub 3 spec, isn't it?
I exported a test book from iBook Author, and in the exported package there was a file called <bookname>.ibooks which looks like an epub with a funny extension.
If you rename the file to <bookname>.ibooks and open it in Sigil, Sigil crashes. That may mean the ibooks file is radically malformed, or Sigil is buggy, or both!
I'm attaching the renamed ibooks file in case anyone wants to poke around in it.