[twowheels]

…OK, I got curious and downloaded a book in both formats and extracted them to perform a diff. Here’s what seems to differ:

- SVG instead of PNG images for the things that are naturally scalable — seems like a good thing

- Ever so slightly different TOC format, seems to be a wash

- The text/ folder has far fewer redundant tags in the new format, making the content files smaller, seems to be a good thing. For example, in this book there is a bit of french mixed in, and I see <i lang=“fr” xml:lang=“fr”> in the standard version, and the advanced version is missing the former lang, only containing the xml:lang bit.

- The CSS seems to be very simplified… the standard version contains a lot of top-right-bottom-left attributes, whereas the advanced version only specifies them as one value, and then the standard version has a HUGE section that says “for legacy reading systems” that seem to be to account for various non compliant devices.

I’m not seeing the overly complicated bit anywhere — it looks very clean to me.

[EDIT: Also downloaded a kepub, and it was basically the std epub w/ some of the Nook specific css missing and a bunch of kobo spans… — still not seeing the problem, it’s almost entirely boring HTML. ]