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The DIKW pyramid, also known variously as the DIKW hierarchy, wisdom hierarchy, knowledge hierarchy, information hierarchy, information pyramid, and the data pyramid, refers loosely to a class of models for representing purported structural and/or functional relationships between data, information, knowledge, and wisdom. "Typically information is defined in terms of data, knowledge in terms of information, and wisdom in terms of knowledge".The DIKW acronym has worked into the rotation from knowledge management. It demonstrates how the deep understanding of the subject emerges, passing through 4 qualitative stages: “D” – data, “I” – information, “K” – knowledge and “W” – wisdom
Not all versions of the DIKW model reference all four components , and some include additional components. In addition to a hierarchy and a pyramid, the DIKW model has also been characterized as a chain, as a framework, as a series of graphs, and as a continuum.