A Unified Model of Internet Scale Alerting Service
Institut für Informatik
Report B 99-15
October 1999
Annika Hinze, Daniel Faensen
Institut für Informatik
Freie Universität Berlin
Takustr. 9, D-14195 Berlin
hinze,faensen@inf.fu-berlin.de
Abstract
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 parallel way.
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