Colon classification (CC)

Colon classification

Colon classification (CC) is a system of library classification developed by S. R. Ranganathan. It was the first ever faceted (or analytico-synthetic) classification. The first edition was published in 1933. Since then six more editions have been published. It is especially used in libraries in India. Its name "colon classification" comes from the use of colons to separate facets in class numbers. However, many other classification schemes, some of which are completely unrelated, also use colons and other punctuation in various functions. They should not be confused with colon classification.


In CC, facets describe "personality" (the most specific subject), matter, energy space and time (PMEST). These facets are generally associated with every item in a library, and so form a reasonably universal sorting system.
As an example, the subject "research in the cure of tuberculosis of lungs by x-ray conducted in India in 1950" would be categorized as:

Medicine,Lungs;Tuberculosis:Treatment;X-ray:Research.India'1950

This is summarized in a specific call number:

L,45;421:6;253:f.44'N5

Organization

The colon classification uses 42 main classes that are combined with other letters, numbers and marks in a manner resembling the Library of Congress Classification to sort a publication.

Facets

CC uses five primary categories, or facets, to further specify the sorting of a publication. Collectively, they are called PMEST:

, Personality, the most specific or focal subject.

; Matter or property, the substance, properties or materials of the subject.

: Energy, including the processes, operations and activities.

. Space, which relates to the geographic location of the subject.

' Time, which refers to the dates or seasons of the subject.

Classes

The following are the main classes of CC, with some subclasses, the main method used to sort the subclass using the PMEST scheme and examples showing application of PMEST.

z Generalia

1 Universe of Knowledge

2 Library Science

3 Book science

4 Journalism

B Mathematics

B2 Algebra

C Physics

D Engineering

E Chemistry

F Technology

G Biology

H Geology

HX Mining

I Botany

J Agriculture

J1 Horticulture

J2 Feed

J3 Food

J4 Stimulant

J5 Oil

J6 Drug

J7 Fabric

J8 Dye

K Zoology

KZ Animal Husbandry

L Medicine

LZ3 Pharmacology

LZ5 Pharmacopoeia

M Useful arts

M7 Textiles [material]:[work]

Δ Spiritual experience and mysticism [religion],[entity]:[problem]

N Fine arts

ND Sculpture

NN Engraving

NQ Painting

NR Music

O Literature

P Linguistics

Q Religion

R Philosophy

S Psychology

T Education

U Geography

V History

W Political science

X Economics

Y Sociology

YZ Social Work

Z Law

Example

A common example of the colon classification is:

• "Research in the cure of the tuberculosis of lungs by x-ray conducted in India in 1950s":

• Main classification is Medicine
• (Medicine)
• Within Medicine, the Lungs are the main concern
• (Medicine,Lungs)
• The property of the Lungs is that they are afflicted with Tuberculosis
• (Medicine,Lungs;Tuberculosis)
• The Tuberculosis is being performed (:) on, that is the intent is to cure (Treatment)
• (Medicine,Lungs;Tuberculosis:Treatment)
• The matter that we are treating the Tuberculosis with are X-Rays
• (Medicine,Lungs;Tuberculosis:Treatment;X-ray)
• And this discussion of treatment is regarding the Research phase
• (Medicine,Lungs;Tuberculosis:Treatment;X-ray:Research)
• This Research is performed within a geographical space (.) namely India
• (Medicine,Lungs;Tuberculosis:Treatment;X-ray:Research.India)
• During the time (') of 1950
• (Medicine,Lungs;Tuberculosis:Treatment;X-ray:Research.India'1950)
• And translating into the codes listed for each subject and facet the classification becomes
• L,45;421:6;253:f.44'N5

Reference: Wikipedia

https://en.wikipedia.org/wiki/Colon_classification