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Authors:
Coutaz, J., and Rey, G.
Title:
Foundations for a Theory of Contextors
Conference: CADUI'02,
May 15-17, 2002 Valenciennes
(F)
Invited Presentation at CADUI
'02
Abstract
This article proposes an operational definition of the notion of context for the
design and development of context-sensitive systems. Our definition draws upon the
distinction between the notion of an instant snapshot of observables (a
situation) and the composition of these observables over time (a context). Observables and their relationships, which are elicited at the design stage of
the development process, can be mapped, at the implementation phase, as colonies of contextors. A contextor is a software abstraction that models
relationships
between observables. Contextors share a common I/O structure including control channels and meta-data to ensure and express QoS (e.g.,
precision, stability), as well as common properties such as reflexivity and
remanence. They can be combined as oriented graphs or encapsulated into higher computational
units.
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