Ugh! EPUB CFIs…
It’s not a topic I grew up dreaming of writing about one day, but it seems like a useful topic to cover, since questions about how to read them come up from time to time (see this recent thread on CFIs in the IDPF forums). I squeezed a quick explanation of them into the Best Practices book, but I had to keep it short, so maybe I can do better justice to them here.
I will say that the specification can be much more daunting to read than CFIs actually are, but that’s not an indictment of the specification. It’s just that CFIs are one of the more technically complex features that were included in EPUB 3.
But let’s start at the beginning: what is a “CFI”?Continue Reading Navigating EPUB CFIs – Part 1