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The “DIKW Hierarchy”, also known variously as the “Wisdom Hierarchy”, the “Knowledge Hierarchy”, the “Information Hierarchy”, and the “Knowledge Pyramid”, refers loosely to a class of models for representing structural and/or functional relationships between the content of communication (data, information, knowledge, and wisdom). — Wikipedia

Most writers about the hierarchy refer to this passage from T. S. Eliot’s The Rock.

Where is the Life we have lost in living?
Where is the wisdom we have lost in knowledge?
Where is the knowledge we have lost in information? — T.S. Eliot, The Rock

Russell Ackoff popularized the hierarchy to categorize the content of communication.
From data to wisdom (Russell L. Ackoff, Journal of Applies Systems Analysis)
The wisdom of the world: Messages for the new millennium (Russell L. Ackoff, The Futurist)
On passing through 80 (Russell L. Ackoff, Systemic practice and action research)

See Data, Information, Knowledge and Wisdom

Resources

These are organized by a classification scheme developed exclusively for Cosma. More…

General

Dictionary

content : (1) substance, gist (2) meaning, significance (3) the events, physical detail, and information in a work of art (4) the matter dealt with in a field of study — Webster See also Oxford, OneLook, Free Dictionary, Wiktionary, InfoPlease, Word Reference, Urban Dictionary

Thesaurus

Roget’s II (Thesaurus.com), Merriam-Webster Thesaurus, Visuwords

Encyclopedia

Content is information and experiences that may provide value for an end-user/audience in specific contexts. Content may be delivered via any medium such as the internet, television, and audio CDs, as well as live events such as conferences and stage performances. — Wikipedia

Britannica, Columbia (Infoplease)