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2.12 Recommendations on Research Topics 121
aspects are critical. Different access levels, control policies, and mechanisms
to guarantee that no identification of personal data is possible by unauthorised
clients/operators must be carefully defined and applied. In addition, and
depending on the use case or scenario, “opt-in” paradigms (in which users
must voluntarily express and confirm their awareness and willingness to share
personal data) should be incorporated as much as possible.
Improved semantics and Data Mining
Currently, the volume of data susceptible of being collected and automatically
stored in information systems is huge. Often, the main problem is
how to “understand” the information captured by the sensors or stored in
the databases. The lack of “data interpretation” impedes the efficient processing
of the information when searching for results or trying to extract useful
information from the source data. A lot of effort must be devoted to the definition
and implementation of semantics and rules making it easier to process
the information. Data representation (within databases) and search/processing
algorithms should be capable of handling higher levels of abstraction, closer
to human interpretation and manipulation of information, and allowing the
(automatic) generation or extraction of relationships among data components
(making possible the definition of complex inference rules). In this sense, definition
and processing of Complex Events (the whole CEP concept) is a field
yet to be explored.
Data sharing and optimization techniques
Novel data sharing and optimization techniques for cloud-based IoT environments.
Publishing techniques for sensor data and from interconnected objects
Techniques for the publishing of data stemming from sensors and Internetconnected
objects as Linked Data, including techniques for the integration of
IoT with the Linked Open Data Cloud (LOD).
2.12.7 Security
Improved frameworks and mechanisms for trust relationships
Further research is required to develop improved frameworks and mechanisms
to enable trust relationships to be established, maintained and assessed.