how digital texts are different from printed books

linkage of fragments and files of the same or different media types

multi or even non linearity of both text structure and individual reading

multimedia and animation of texts in the broadest sense

interactivity as a way for the user to intervene in the screen or database sets

interactivity as communication between different protagonists on the computer network

as a corollary of the two previous points, shifts in or even de-differentiation of traditional action roles such as author, reader and editor