Diagram vs. Schema — What's the Difference?

A diagram is a symbolic representation of information using visualization techniques. Diagrams have been used since ancient times on walls of caves, but became more prevalent during the Enlightenment.

A plan, outline, or model

A simplified drawing showing the appearance, structure, or workings of something; a schematic representation

(Psychology) A pattern imposed on complex reality or experience to assist in explaining it, mediate perception, or guide response.

Represent (something) in graphic form

An outline or image universally applicable to a general conception, under which it is likely to be presented to the mind (for example, a body schema).

A plan, sketch, drawing, or outline designed to demonstrate or explain how something works or to clarify the relationship between the parts of a whole.

(databases) A formal description of the structure of a database: the names of the tables, the names of the columns of each table, and the data type and other attributes of each column.

(Mathematics) A graphic representation of an algebraic or geometric relationship.

(markup languages) A formal description of data, data types, and data file structures, such as XML schemas for XML files.

A chart or graph.

(logic) A formula in the metalanguage of an axiomatic system, in which one or more schematic variables appear, which stand for any term or subformula of the system, which may or may not be required to satisfy certain conditions.

To indicate or represent by or as if by a diagram.

(Christianity) A monastic habit in the Greek Orthodox Church.

A plan, drawing, sketch or outline to show how something works, or show the relationships between the parts of a whole.

An outline or image universally applicable to a general conception, under which it is likely to be presented to the mind; as, five dots in a line are a schema of the number five; a preceding and succeeding event are a schema of cause and effect.

A graph or chart.

An internal representation of the world; an organization of concepts and actions that can be revised by new information about the world

(category theory) A functor from an index category to another category. The objects and morphisms of the index category need not have any internal substance, but rather merely outline the connective structure of at least some part of the diagram's codomain. If the index category is J and the codomain is C, then the diagram is said to be "of type J in C".

A schematic or preliminary plan

(transitive) To represent or indicate something using a diagram.

(UK) To schedule the operations of a locomotive or train according to a diagram.

A figure or drawing made to illustrate a statement, or facilitate a demonstration; a plan.

Any simple drawing made for mathematical or scientific purposes, or to assist a verbal explanation which refers to it; a mechanical drawing, as distinguished from an artistical one.

To put into the form of a diagram.

A drawing intended to explain how something works; a drawing showing the relation between the parts

Make a schematic or technical drawing of that shows how things work or how they are constructed