Freie Universität Berlin, Fachbereich Mathematik und Informatik : Ser. B, Informatik ; 99,15
004 Datenverarbeitung; Informatik
In the last years, alerting systems have gained strengthened attention. Several
systems have been implemented. For the evaluation and cooperation of these
systems, the following problems arise: The systems and their models are not compatible,
and existing models are only appropriate for a subset of conceivable application
domains. Due to modeling differences, a simple integration of different
alerting systems is impossible. What is needed, is a unified model that covers the
whole variety of alerting service applications.
This paper provides a unified model for alerting services that captures the special
constraints of most application domains. The model can serve as a basis for
an evaluation of alerting service implementations.
In addition to the unified model, we define a general profile structure by which
clients can specify their interest. This structure is independent of underlying profile
definition languages. To eliminate drawbacks of the existing non-cooperating
solitary services we introduce a new technique, the Mediating Alerting Service
(MediAS). It establishes the cooperation of alerting services in an hierarchical and
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