Principles of Division in Library Classification.

Shera and Egan have given the following account of the principle of a hierarchy:
  • The hierarchical proceeds by the assembly of the groups of sciences of the principal fields of knowledge into main classes of divisions. Such classes have great extension and small intention.
  • The process is based on different qualities of which each main class, and thus sub-classes or sub-divisions are made.
  • Each sub-division in three classes is divided by further different values to produce still further sub-divisions and more sections and like wise process continues.
  • d) Each single set of sub-divisions may consists of classes of equal ranks,a coordinate position.
Order of subject in array: (Ranganathan)
  • Canonical order: Traditional and conventional sequence.
  • Evolutionary order: If same line of evaluation, earlier is first.
  • Spatial contiguity: Geographical area.
  • Chronological order: If two classes belong to an earlier point of time, then one must have precedence over other.
  • Alphabetical order.
  • Increasing complexity: If one class deals with lesser degree of complexity than the other, then that must have precedence over the other.
  • Consistent order: Consistency should be maintained.

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