EPUB 3.1 Now an IDPF Recommended Specification
The IDPF Membership has unanimously approved EPUB 3.1 as a Recommended Specification.
The EPUB 3.1 revision includes a new accessibility specification and an accessibility techniques document.
Developed as part of EPUB 3.1 to provide guidance on making EPUB publications accessible, these new documents are designed to be equally applicable to older versions of EPUB 3. More information is provided on the IDPF website.