The huge amount of data over the Web offers numerous possibilities to bridge the digital gap between the people working in heterogeneous contextual settings, such as the different social contexts, interaction devices, personal capabilities and preferences. It would be unwise to ignore the importance of the recently emerging activity based Web for all types of users, and its relationship with the Knowledge Management. The frequency of transactions made over the Web and the ever increasing published contents must be somehow taken into account considering the varying physical and cognitive...