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.