Comme OEB à qui elle succède, la spécification Open EBook définit les données nécessaires à la création d'un livre électronique.
".epub" is the file extension of an XML format for reflowable digital books and publications. ".epub" is composed of three open standards, the Open Publication Structure (OPS), Open Packaging Format (OPF) and Open Container Format (OCF), produced by the IDPF. ".epub" allows publishers to produce and send a single digital publication file through distribution and offers consumers interoperability between software/hardware for unencrypted reflowable digital books and other publications.
Descriptif en cours de rédaction.