198 ◾ Leszek Lilien et al.
© 2011 by Taylor & Francis Group, LLC
Another component from EASY applied in Oppnets, and in particular in
the CC, is the technique to eciently organize the helper registry in the Oppnet
SCOW-Q model (corresponding to the service repository in EASY). is
approach to the helper registry enables ecient insertion of service advertise-
ments, minimizing the impact to already registered services. It also helps reduce
the number of matches considered for agiven request. In contrast to Oppnets,
the semantic reasoning used in EASY to build the classied ontology hierarchies
occurs oine.
7.3.4.3 Classification of Helpers According to Their
Access, Capability, and QoS Specifications
e pervasive and ubi ...