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.
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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
Thanks & Regards
Asheesh Kamal
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