What are the appropriate concepts of information? This is an old issue, yet which has to be the No.1 and cannot be ignored in the study of information science. Diverse controversies and confusions in the studies of information are resulted from different understandings of the concept of information. This fact clearly indicates that the real root, which leads to the diversity of approaches, is due to the “divide and conquer” methodology. We suggest here a novel understanding of the concept of information. At first, a group of popular definitions of information are analyzed. Then, the system methodology is applied to the diversity of the definitions with the goal of unification. Based on this methodology, an ecological model for information is established and the systematic definitions of information are hence derived from this model.
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