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language, Akkadian, we can fully implement
ambient intelligence scenarios that are described in
terms of software smart objects. Those software
smart objects can consume, and offer to other
objects an arbitrary number of networked services
through which they can sense and change the
physical environment in the way the scenario
defines. Additionally, for scenarios described in
terms of hardware smart objects, Akkadian can be
used for simulating their executions. Finally, we
demonstrated the language’s effectiveness through
two examples in which smart objects are
implemented as Akkadian programs.
As mentioned in the previous sections, one
important short-term goal for Akkadian runtime is
the implementation of additional service engines.
Specifically, the implementation of a Web Service
engine will allow software smart objects to fully
utilize web services through their ports in addition to
the already available service technologies. Provided
that there is a plethora of publicly available web
services on the Internet, this addition will greatly
expand the utility of software smart objects.
A big section missing from Akkadian, and the
smart object model in general, is the support for
security primitives. Currently, as mentioned before,
an object can connect to another object and use the
services it offers as soon as it senses its presence
(see 3.4). For achieving an effective level of
security, the notion of the scope and the process
through which objects can connect to each other,
needs to be refined. Towards this direction, we are
working on introducing scope-specific statements in
Akkadian, through which an object will be able to
define its own scope and control if, and under which
conditions, it can appear in the scope of other
objects.
Ultimately, the most important reason for
proposing a new language – and not developing a
framework in a general-purpose language – for
programming smart objects is to systematically
extract and support, in a syntactically intuitive way,
common usage patterns as smart objects are used in
ambient intelligence and ubiquitous computing
scenarios. It is an important goal of Akkadian, its
runtime environment, and its design environment to
be robust and easily extensible for incorporating
new, high-level behaviours.
ACKNOWLEDGEMENTS
This work has been supported by the FORTH-ICS
internal RTD program “Ambient Intelligence
Environments”.
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