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According to the analysis of business process modeling technology and business process execution technology, a business process modeling framework named REPC (Rule-Merged Event-driven Process Chain) has been proposed to solve lack of process semantics such as business rule in transformation from business process modeling to business process execution. Through service-oriented Enterprise Resource Meta-model the semantics of basic elements in process model are modeled. And on the basis of resource models business rules are modeled. Finally the business rules are integrated with business process model to maintain the semantics of process model completely. With the implementation of a prototype of the REPC-based modeling platform and a purchase process example, the correctness and the practical usability of the modeling framework has been verified. REPC provides a new framework for business process modeling in SOA information system.