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Workflow technology is gaining attention in healthcare domain because it supports and assures fluent execution of complex healthcare business process. In order to implement workflow technology in healthcare environment, data-flow perspective issues should be considered. This paper analyzes basic characters of healthcare data from the point of workflow view, then presents an approach of process data driven workflow modeling method: the transformation of data fires events, which drive the transfer among tasks that have executable sequence in the workflow process. XML based workflow model description language is proposed as well, which can be mapped into executable software system framework conveniently and improve component's capability of reusing and systemic agility. Furthermore, an actual healthcare process modeling example, medical infection control process model, is presented, which illustrate our approach is feasible.