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Scaleable Vector Graphics (SVG) - a vectorized graphic format that enables resizing of images without loss of quality
Interactive SVG - Similar to SVG but interactive that enables the user to click part of the image and see it moves or zoom
MathML - A markup language (based on XML) for rendering mathematical formulas
JavaScript - A programming language that enables developers add interactivity to websites or digital book pages
Support for Complex text layou languages - Language such as Hebrew or Arabic that are written from right to left. (the previous standard had partial support for these languages, the new standard fully support these languages including page progression direction)
Support for top to bottom languages - Languages such as Chinese or Japanese written from top to bottom are now fully supported
Fixed layout pages (mainly for children books and/or comic books)
Media Overlay (speak alound as it is called by Apple) - A features adding a layer of audio on top of text or images, that the reader hightlights the words (or images) the audio is talking about, uses a special markup language (SMIL)
Support for video inside pages
The new standard uses HTML5 and CSS3 for pages and thus includes many design features such as round corners opacity, CSS animation etc.
Photo:
http://www.prlog.org/
