What’s in an EPUB File?: The OPS Folder

The OPS folder contains the text of the book, plus any fonts, images or audio/visual materials contained within the book.

What’s in an ePUB?: The OPF File

The OPF file is located within the OPS folder. ‘OPF’ stands for Open Package Format. It’s essentially an XML file, although it has┬áthe file extension .opf instead of .xml. It […]

What’s in an ePUB?: The Root Directory

An introductory look into the first level of an ePUB file