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Sayers (1881-1960) in the School of Librarianship, University College London, Ranganathan was most attracted to classification studies. Being a mathematician and a close student of an inspiring teacher W.C.B.
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The latest edition, and the first published after the death of Ranganathan, was the seventh ( Ranganathan 1987). The Colon Classification (CC), conceived and initially developed from 1924 to 1928, and initially applied in the Madras University Library, was first published in 1933 ( Ranganathan 1933) by the Madras Library Association (founded by Ranganathan in 1928). A brief history of the editions of Colon Classification This article focuses on his Colon Classification (CC) and does not cover facet classification in general, or the biography of Ranganathan, as other entries in the encyclopedia are planned for these topics. His books, on almost all branches of library and information science, are librarians' lore. Ranganathan's views, appeals, and the research findings he communicated through books, journals, reports, international seminars, and lectures, have pervaded, and still constitute, the core of our current knowledge of the subject. His extensive work on all aspects of library science was epoch-making, and created a paradigm next in importance only to the pioneering work of Melvil Dewey (1851-1931), who is often considered the father of modern librarianship. His work forms the bedrock of an influential theory of the wide discipline of knowledge organization. Internationally recognized as the most prolific library thinker and innovative librarian of his time, his exemplary dedication and uncanny insights won him the acclaim of his peers the world over. Ranganathan (1892-1972) is deservedly called the father of the Indian library movement. The entry concludes with a discussion of the extent of application of CC in libraries, its contribution to the science of classification, and a view of its future. Briefly explained are facet and phase analyses and number building with its notational base of 74 characters and symbols. Semantic and syntactic relations are enshrined in his order of main classes, Principles of Helpful Sequence in arrays, PMEST facet formula fitted with rounds and levels of facets, and other principles, such as the famous wall-picture principle for citation order of facets, and numerous devices for improvising class numbers for nonexistent isolates and potential subjects. Tools for designing and evaluating a system are enshrined in his 55 canons, 22 principles, 13 postulates, and 10 devices ( Indian Statistical Institute 2012, 34-38). The unique features of CC are described, including the work in idea, verbal, and notational planes. In this article the evolution of CC through its seven editions is discussed. He developed the revolutionary Colon Classification (CC) from 1924 to 1928, which was published in seven editions from 1933 to 1987. Shiyali Ramamrita Ranganathan (1892-1972) has been called the father of the Indian library movement. Three versions of Colon Classificationģ.1 Version 1(1933-1950): rigidly faceted eraģ.2 Version 2 (1950-1963): analytico-synthetic eraģ.3 Version 3 (1963-1987): freely faceted eraĤ.1 Three planes of work: 4.1.1 Idea plane 4.1.2 Verbal plane 4.1.3 Notational planeĤ.3 Division of knowledge in the CC: 4.3.1 Complex subjects 4.3.2 Main classes and their order 4.3.3 Triangular representation of main classes 4.3.4 Division of a main class 4.3.5 Division of the universe of knowledge 4.3.6 Facet analysis 4.3.7 Facet formula: citation order 4.3.8 Absolute syntax: quest for a Holy Grail 4.3.9 Synthesis 4.3.10 Shelf arrangement 4.3.11 APUPA pattern 4.3.12 Index 4.3.13 Book numbers A brief history of the editions of Colon Classificationģ. Home about ISKO join ISKO Knowledge Organization journal ISKO events ISKO chapters ISKO people ISKO publications Encyclopedia KO literature KO institutions ⇗ KOS registry ? members contact usĮdited by Birger Hjørland and Claudio GnoliĢ.