Words data, informationand knowlegeare concepts based on meaning, used to categorize, subjectively , the general "conciseness" and "usefulness" of specific information set.
These words do not have an exact meaning , since they relate to the main purpose and methodology of information processing; In the field of information theory, this does not matter, because all three are one and the same: a collection of "information" (in the sense of information).
However, they are useful in context to summarize the general nature of the set of information, as explained below.
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