The advent of the Interactive Digital TV
around the world modifies the user experience in watching
TV, making it richer mainly by enabling user interactivity.
Users become pro-active and begin to interact in several
ways: building virtual communities, discussion about
contents, sending messages and recommendations. In this
scenario the user participation in a collaborative assumes
an important role. Another preponderant point to consider is
the growing of the number and diversity of programs and
...