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

The OPS folder (or OEBPS if you prefer, the two names are interchangeable) contains the guts of your EPUB. OEBPS stands for ‘Open eBook Publication Structure’ and OPS stands for […]

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 the 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