University of Nigeria
In this paper, the authors adopt a system-oriented approach to the collaborative tagging and define it as a set of interactions in the system of web resources. The system of web resources is modeled as a set of interacting agents and collaborative tagging is represented as concurrent initiation of inter-actions between agents in the system. Also, they define concept of knowledge for individual agents. Later they use concepts of interaction and knowledge to give definition of a Link. Then, for a given universal set of resources, they introduce Tag Cloud System (TCS) and definition of (possibly fuzzy) collections of resources.