Which brings me to my favorite eBook format: ePUB
It is great to see that so many vendors are adopting the open ePUB standard defined by the International Digital Publishing Forum (IDPF).
This standard consists of three specifications:
- Open Publishing Structure (OPS)
- Open Packaging Format (OPF)
- OEBPS Container Format (OCF)
Combined they form a single .epub file which internally uses XHTML files to build the structure of the eBook. The open format, flowable text, image support, CSS styles, and embedded font support combine to form a winning package.
Click here for more information on the ePUB standard.