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Monday, April 11, 2016

Main Class of Colon Classification (CC)


Introduction
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.
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.[1]
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

 Main Class and Facet 
The colon classification uses 42 main classes that are combined with other letters, numbers and marks
 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:

1. GOPINATH (M A). Colon classification: Its theory and practice. Library Herald . 26, 1 - 2; 1987; 1 - 3.
2. Colon Classification (6th Edition) by Dr. S.R. Ranganathan, published by Ess Ess Publications, Delhi, India
3. Chan, Lois Mai. Cataloging and Classification: An Introduction. 2nd ed. New York: McGraw-Hill, c1994. 


Thanks & Regards
Asheesh Kamal



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