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from the platform. If the designer wishes the interface
to adapt to the behaviour of the user (for instance, if a
user is always requesting to see images enriching the
presentation, the interface should start displaying im-
ages by default to that user), then the inclusion of a
user model may introduce that feature.
An interface without any of the models available
in run-time would be a fixed interface. An interface
with all the models available would be a fully adapt-
able interface. The designer should choose the mod-
els which will be transferred to the run-time interface,
based on her knowledge of the target users, platforms
and environment.
5 CONCLUSIONS
In this paper we have presented the motivations for
the development of an adaptable interface for DTBs.
Variables governing the adaptation and the possible
adaptable components have been identified, and sev-
eral relations between variables and components pre-
sented.
A model-based architecture for the creation of flex-
ible multimodal user interfaces for DTBs was pro-
posed. This architecture is the base for further de-
velopments, which target the creation of an adaptable
user interface. The introduction of some of the inter-
face development models in the run-time version of
the interface will allow for the possibility of adaptive
behaviour, if supported by the interface presentation
platform.
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