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The effective business process management has received attention recently for improving business process performance and supporting coordination scenarios in collaboration platform. However, the user and role authorities in the existed collaboration platform cannot automatically change in accordance with time and location. Since handling processes with tasks and data separated by enterprise boundaries is hard, this study presents the Collaboration Service Integration Platform (CSIP) on the basis of the standard Business Process Model and Notation (BPMN) and Context-Aware RBAC (CA-RBAC) model. CSIP is not only to narrow the gap in the existed popular collaboration platform such as workflow process limitations but also to satisfy the increasing needs on the different contextual attributes.