Abstract
Nowadays a large number of user-adaptive systems has been developed.
Commonly, the effort to build user models is repeated across applications
and domains, due to the lack of interoperability and synchronization
among user-adaptive systems. There is a strong need for the next
generation of user models to be interoperable, i.e. to be able to
exchange user model portions and to use the information that has
been exchanged to enrich the user experience. This paper presents
an overview of the well- established literature dealing with user
model interoperability, discussing the most representative work which
has provided valuable solutions to face interoperability issues.
Based on a detailed decomposition and a deep analysis of the selected
work, we have isolated a set of dimensions characterizing the user
model interoperability process along which the work has been classified.
Starting from this analysis, the paper presents some open issues
and possible future deployments in the area.
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