Dynamic Discovery for Semantic Web Services Based on Evolving Distributed Ontologies
Yinglong Ma · Chinese Journal of Computers · 2005
Semantic Web and Web Services have converged into the semantic Web services. By adopting distributed, continuously evolving and heterogeneous ontologies, semantic Web services provide the mechanism of semantic description of Web services for improved automata and interoperability. Along with the changes in application requirements of the enterprises, Web services must be updated, so do the distributed ontologies which are associated with the Web services. In the situation, how to specify the changes in ontologies, keep their consistencies and achieve semantic query of Web services based on the evolving distributed ontologies, become a great challenge. This paper adopts the distributed extension of SHOQ(D) description logic—distributed description logic, to describe correlated heterogeneous distributed ontologies, proposes the concept of prioritized distributed knowledge base( PDK ), and also discusses some properties about PDK . PDK can give the evolutions and updates of distributed ontologies which are suitable for semantics Web services. Based on PDK , a semantic query on Web services can be performed by checking p satisfiability of concepts in accord with the query in the most prioritized PDK . The definition of p satisfiability is creatively proposed for addressing the consistencies existing in distributed knowledge base. Using this definition, we find that the different evolution versions of PDK will form a partial order. This property will make me better handle evolutions of PDK .