Rey, J. Coutaz.
Contextor Infrastructure for Context-Aware Computing.
on Component-oriented approach to context-aware systems
This paper addresses software adaptation to context of use. It goes one
step further than our early work on plasticity . Here, we propose a
revision of the notion of software plasticity that we apply at the widget
level in terms of comets. Plasticity is defined as the ability of an interactive
system to withstand variations of context of use while preserving quality
in use where quality in use refers to the ISO definition. Plasticity is
not limited to the UI components of an interactive system, nor to a single
platform: adaptation to context of use may also impact the functional
core, it may have an effect on the nature of the connectors, and it may
draw upon the existence of multiple platforms in the vicinity to migrate
all or portions of the interactive system. A new reference framework that
structures the development process of plastic interactive systems is presented
to cover these issues. The framework is then applied at the granularity
of widgets to provide the notion of a comet. A comet is an introspective
widget that is able to self-adapt to some context of use, or that can
be adapted by a tier-component to the context of use, or that can be dynamically
discarded (versus recruited) when it is unable (versus able) to cover
the current context of use. To do so, a comet publishes the quality in
use it guarantees, the user tasks and the domain concepts that it is able
to support, as well as the extent to which it supports adaptation.
the pdf file