Well-defined metrics
can be further utilized by measurement organizations to check whether the service
provider conforms to the agreement. For different usage phases of the OWL-QoS
ontology, we design the QoS matchmaking framework, the measurement framework,
and the measurement code handler. Based on the ontology level, semantics in the
specification helps to achieve better interoperability, automation, and extensibility.
To prove the feasibility of the system in the e-business world, we test the prototype
framework and find its potential usage in a real Web services environment.
In the future, Semantic Web technology will help to integrate system components
and tools into a more unified system. Precisely defined semantics and unified system
view will reduce the system integration cost and reuse the well-established domain
knowledge. New trends in Semantic Web technology will form new solutions for
system management. For example, Semantic Web rule language (SWRL), which
extends the set of OWL axioms to include Horn-like rules (Horrocks et al., 2004),
may help the expression of QoS adaptation rules and system management policies.
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