The Design Principles and Practices of Interoperable Smart Spaces - Advanced Design Approaches to Emerging Software Systems - page 40

Figure 3. A fragment of adaptable KPs taxonomy

interaction devices, smart objects and seman-
tic connections in smart environments. Figure
3 represents a fragment of an Adaptable KP' s
taxonomy arranged as a tree. Some of the tree
leaves may be Application-Specific KPs, which
will be turned into “Adaptable KPs” a s soon as
a new KP is implemented, starting from one of
them. For example, the flagged KPs in Figure 3
are the identified candidates of Common KPs .
As the number of KPs is expected to grow very
quickly, the KP taxonomy is becoming large and
needs tool support.
With respect to their role in the smart space,
five KP role classes were defined as follows:

actuators, message dispatchers and wire-
less sensor networks.
• Aggregator is any KP that interacts with
one or more SS(s) and with no other en-
tity. Aggregators enrich SS with informa-
tion produced by processing information
originating from the SS itself. Reasoning
and prediction KPs are examples of
aggregators.
• Controller is any KP that dynamically up-
dates semantic connections in the SS. Any
KP that is involved in the digitalization of
the physical world is a potential controller
KP as it may need to update semantic con-
nections in real time.
• Filter is any KP that processes and fil-
ters data before storing it to the SS. It
may collect data from an external sys-
tem ( Filter&Adapter ) or process data
which is already stored in the SS (e.g.

• Adapter is any KP that interacts with the
SS and entities which are external to the
SS itself. Adapters are called legacy adapt-
ers if the external entity handled by the KP
already existed before the SS, e.g., sensors,