Context a?ects a wide range of activities in humans and animals as well as in arti?cialagentsandothersystems.Theimportanceofcontextiswidelyackno- edged, and "context" has become an area of study in its own right, as evidenced bynumerousworkshops, symposia, seminars, andconferencesonthisarea.CON- TEXT, theoldestconferenceseriesfocusing oncontext, is unique inits emphasis on interdisciplinary research. Previous CONTEXT conferences have been held in Rio de Janeiro, Brazil (CONTEXT'97), Trento, Italy (CONTEXT'99, LNCS 1688), Dundee, UK (CONTEXT 2001, LNCS 2116), Palo Alto, USA (CON- TEXT 2003,...