ePub

Publishing electronically, actually releasing e-books, requires channels, stakeholders, standards and formats. .epub is the open data version of the latter.

– What Wikipedia says about it.
– International Digital Publishing Forum.
– Comment créer un fichier ePub ? (eBouquin).

(To be elaborated further)

& :
– Publication ? | Open format for documents | Édition électronique (webOL).
– Twitter/@webol/egutenberg.