Reasoner or rule engines help the system to achieve better automation.
???. Extensibility..Different Web services have various requirements for their QoS
descriptions. The new required metrics are relatively easy to be added into the
knowledge base. The openness of ontology definition facilitates the sharing
of experiences and speeds up the development cycle.
In addition, our profile design achieves the design principles described in the Basis
for a QoS Ontology section. Layered design and ontology supporting tools help to
make the specification Easy of use for general developers. Metric concept definition
and metric individual details??™ definition help to gain precision and flexibility for the
measurement. The QoS constraints are designed at concept level. Hence the refinement
of the profile provides the object-oriented style feature and high reusability for
the specification. The profile definition has clearly defined syntax and semantics.
This allows the parser and the reasoner to do the syntax and semantics validation
for the profile. Different portions of the specification have different purposes.
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