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Xiaoying Tu
Carnegie Mellon University

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Collected Notional Machines

A conceptual model as a map
Database Analogies
Basic relational algebra operators as a diagram
Visual Representation
Database indexing as a book's index
Database Analogies
Joining multiple tables as snowball rolling
Database Analogies
Levels of normalization as a venn diagram
Visual Representation
Union, intersection, except, and symmetric difference as Venn diagrams
Visual Representation
Visual representation of a simple equi-join as a diagram
Visual Representation
relational model as a Lego building
Database Analogies

Forms of NMs

Analogies Representations Database Representation-Based Database Analogy-Based

What is a Notional Machine?

A notional machine is a pedagogic device to assist the understanding of some aspect of programs or programming. To something along the lines of A notional machine is a pedagogical tool designed to support the understanding of programs, programming, and other aspects of computing such as databases.

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