Organizations and communities are held together by knowledge flow networks whether people are aware of them or not. Knowledge flows influence the evolution of culture and language, promote international collaboration, and hasten the development of science. In this paper, we propose a Petri net based model of knowledge flow for more effective and efficient knowledge management, knowledge flow management, and knowledge flow network planning. We describe a research approach and modeling environment that enables the knowledge flows to be formalized through computational models. The model enables u...