Context is not only related to physical entities, and there is something more than actions.
Institution add another level to the place.
Conceptual framework to analyze the situation:
Institution were traditionally tight to architecture, but with mobile devices and wireless it is less so.
What consequences does the loosened mapping between activity and place hold for the design od contec=xt-aware digital devices?
Context is not only place, but must be reckoned in both
architectural and institutional terms.
Some application have a context that depends by a very strong coupling between architecture and institutions, other applications are at the extreme, where they depend only on the architectural context or the institutional context. Between the extremes there is a large space of possibilities. Mobile and wireless breaks down the mapping between institutions and places and more application will fall in this middle ground of loosely coupled activities.
Designing the activities in such a way that the computer can recognize the relevant aspects of it.
Imposing using collaboration is not easy, but without it it will not be possible to capture the institutional context that is more and more loosely coupled to the place or built context.