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The formulation of business model serves as the first step for e-business system development. However the industry lacks adequate methods for e-business modeling. This paper proposes service-oriented componentization of e-business model by which a homogeneous component model (e-business model) is constructed. The component based e-business model supports coarse-grained semantics modeling. The e-business model describes the architecture of the organization and its network of business components for creating, marketing, and delivering value objects. The business architecture is modeled explicitly and the business component specifications are attached with semantic information, which supports assessing, measuring, and simulating e-business processes. The e-business model includes two kinds of architectural patterns: e-business pattern and service composition pattern, which allows reuse of analysis, business, and design knowledge rather than code.