Design on the BPEL Engine Generator for Adding New Functions

Business Process Execution Language (BPEL) is widely using in various domains because it describes the flow of works depending on their conditions, rules and the call of Web services in service-oriented computing environment, and many experts have been studying the BPEL to use, but still the high cost is required in existing systems. Also, the systems can only add a single function, and it is difficult to design and add new functions as necessary. To overcome this problem, it suggests the new function (?) to be low cost BPEL engine generator by defining XAS4B document that can extend the grammar function of BPEL through XML schema in order to add new functions as necessary and by processing the document. However, new functions, which cannot be found in BPEL grammar, are required in a specific domain. When a new function, which does not exist in the existing language, is required, the domain-specific language should be newly defined and developed in general. One more advantage of the proposed system is able to add new functions without modifying BPEL engine by AspectJ.