Semantic and Ontology Framework in Service Oriented Architecture

Software maintenance is typically cost more than 50 % of the total lifetime cost of a software system, because most of the system is implemented based on the analysis of the static and outdated demands and the real demands are facing constantly changing problems. Service Oriented Architecture (SOA) reduces the cost by turning the system into a collection of loosely coupled services and cooperation among them, thus each service can evolve itself without impacting significantly on the rest of the systems. However, one of the important parts of the SOA, Service Composition and Orchestration is mostly done by custom developed solutions. A unified solution is required to facilitate the implementation of the SOA and the communication and cooperation among different systems which applies the SOA. That is where our solution goes to, the Semantic and Ontology Framework in Service Oriented Architecture. 2. Why? Two of the main roles in the SOA are service provider and service consumer. Current technologies for implementing SOA such as Web Service provides a relatively mature solution for creating con-nections between service consumer and service provider and execute the cooperation to accomplish the task, but the solution of discovering the service provider which is most appropriate for th