Saturday, May 20, 2017

POPSI (Postulate-Based Permuted Subject Indexing)

POPSI (Postulate-Based Permuted Subject Indexing)

POPSI (POSTULATE-BASED PERMUTED SUBJECT INDEXING)  ➨ The inherent weakness of chain indexing has been its dependence on a scheme of classification. Another weakness was its disappearing chain. In view of this situation, the information scientists at the Documentation Research and Training Centre (DRTC), Banglore, directed themselves from these limitations; the Postulate Based Permuted Subject Indexing (POPSI) is the results of these efforts. It was developed by Ganesh Bhattacharya.

POPSI does not depend on the Class Number but is based on Ranganathan’s postulates and principles of general theory of classification.

POPSI  is specifically based on:

(a) a set of postulated Elementary Categories (ECs) of the elements fit to form component of subject proposition.

Elementary Categories are:

Discipline (D) - It covers conventional field of study, e.g. Chemistry, Physics, etc.,

Entity (E) - e.g. Plant, Lens, Eye, Book, etc.,

Action (A) - e.g. Treatment, Migration, etc; and

Property (P) - It includes ideas denoting the concept of ‘attribute’ – qualitative or quantitative. e.g. Power, Capacity, Property, etc.

(b) a set of rules of syntax with reference to ECs

The Syntax is based on the Ranganathan’s general theory of classification.

(c) a set of indicator digits or notations to denote the ECs and their subdivisions. It is got by POPSI table as given below:

0 = Form modifier
1 = General treatment
2 = Phase relation
     2.1 = general
     2.2 = bias
     2.3 = comparison
     2.4 = similarity
     2.5 = difference
     2.6 = application
     2.7 = influence
3 = Time modifier
4 = Entity modifier
5 = Place modifier
6 = Entry
7 = Discipline

(d) a vocabulary control device designated as ‘Classaurus’.

   POPSI (Postulate-Based Permuted Subject Indexing)
   Steps in POPSI (with Example)