Research of Classification Based on Extenics

Classification techniques play a significant role when people recognize and research on matters. To consider the difficult classification problems, this paper introduces the concepts of classifiable matter and unclassifiable matter, and discusses the principles of classification based on extenics. Meanwhile, it presents a classification matter-model to describe matter, offers a means to find out the key classifiable factors, and achieves classification by transformation and analysis of two aspects of the unclassifiable contradictory problem.