Complex service-oriented enterprise application needs compose Web services to satisfy user specific requirements. Several approaches have been proposed to fulfill this need. However, those approaches and their runtime infrastructure are weak in providing flexible features such as dynamism and adaptability, which are needed in mobile networks and wireless scenarios. A semantic programming language - SPL and an integrated framework - SPLDE are proposed. The SPL is designed for integrating and orchestrating Web services, which is equipped with service role to decouple the static binding relation between business process and its participants. The concept of rule is also introduced in SPL to separate business decision from business logic to satisfy varying user requirements in evolving environment. The proposed SPLDE framework is used to design and execute business process based on semantic Web services with SPL language, which tries to offer an effective systematic solution for development and execution of service-oriented software system.