Tetrad Theories

Here is a table to describe some of the tetrads we have discussed so far in this blog.


The first column is our friend Structured Query Language (SQL). The second column is the four components of physiological and psychological health. The third column is the tetrad of McLuhan’s Laws of Media. The fourth column are the Zachman Framework’s four perspectives. The fifth column are the first four Structured Development Lifecycle (SDLC) phases.

The rows in the table correlate the similar facets of each of the tetrads. I will go into detail in a later post. How does energy, matter, location and event correlate? How do the Secrets of the Universe of Discourse correlate? How does data, information, knowledge and wisdom correlate? How does colon classification correlate?

Take a moment and let yourself stretch.

7 Responses to “Tetrad Theories”

  1. Tetrad Theories (continued) « relationary Says:

    […] 22nd, 2007 In my previous post I gave some examples of tetrad theories.  Here are some […]

  2. The Innovator’s (and Zachman’s) Dilemma « relationary Says:

    […] what Christensen really achieves is to provide a substantiation of his tetrad, and consequently Zachman’s, through a solid body of historical […]

  3. The Innovator’s (and SQL’s) Dilemma « relationary Says:

    […] Innovator’s Dilemma tetrad has provided us with another viewpoint on the SQL […]

  4. God, Abram and Abraham Maslow « relationary Says:

    […] On further examination of this passsage and of Maslow’s hierarchy we can find that there is a defining quality between the physiological and the remaining needs. The physiological need does not require social interaction, the four remaining needs do. This produces another tetrad. […]

  5. What Do the Boxes and Lines Mean? « relationary Says:

    […] These four graphics are representative of the four fundamental relationships in the relational model using a notational style called IDEF1X.  These four relationships are used to design relational databases.  I am of the opinion that these relationships form what I call a “tetrad”, a term I borrow from Marshall McLuhan, and that it shares characteristics with other tetrads. […]

  6. Patrick McNulty Says:

    The tetrad theory is becoming compulsive! i am taking a Philosophy 201 course and I am trying to set up a universe to define alternative energy perspectives…may have bitten off more than I can chew! Anyone have any advise?

  7. grant czerepak Says:

    Hi Patrick,

    Could you elaborate on what you are working on?

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