The purpose of this chapter is to present our contribution in business process modeling within the CAS (CIMOSA Application Server) project. In this project, a referential, which helps enterprises to model their internal or collaborative activities within an enterprise chain (i.e., extended enterprise) is proposed. The referential is supported by a meta-model, which consists of a process modeling concept and a methodology as a user modeling guide. Enterprise activities modeling is based on a business process approach CIMOSA-based and that we define into an enterprise system. In this manuscript, the implementation of the referential is detailed within an information system by a component approach and a framework, which integrates the modeling methodology. The referential components are developed with .NET Microsoft technology.