New York, NY, May 23, 2011 - (PRESS RELEASE) The International Digital Publishing Forum (IDPF) today announced that EPUB® 3 is now a Proposed Specification for final member and public review. EPUB, an XML and Web Standards based format developed by the IDPF, has become a key global standard in the rapidly developing digital publishing industry, enabling digital books and publications to be portable across devices and reading systems. EPUB 3 is a major revision of the standard that aligns EPUB with HTML5 and adds support for key emerging requirements including video, audio, interactivity, vertical writing and other global language capabilities, improved accessibility, MathML, and styling and layout enhancements.