Which of the following belongs to the category of Assigned Indexing?

A. KWOC

B. POPSI

C. SCI

D. PRECIS

E. Chain Indexing

Choose the correct answer from the options given below:
 

The correct answer is B, D, and E only.

Key Points

• Assigned Indexing:
  • The process of indexing in which a human indexer selects one or more subject headings or descriptors from a list of controlled vocabulary to represent the subject(s) of a work.
  • It is also known as Assignment Indexing and Concept Indexing.
  • Some notable examples of assignment indexing are chain indexing, PRECIS, POPSI, classification schemes, etc​

Additional Information

• ​Pre- coordinate Indexing-
  • The pre-coordinate index constitutes a collection of index entries in which concepts from documents are coordinated according to a plan using a linear sequence.
  • Those precoordinated indexes when arranged alphabetically are known as alphabetical subject indexes and when arranged according to a scheme of classification they are known as classified indexes or classified catalogs.
  • All pre-coordinate indexing models are based on classificatory principles such as facet analysis and synthesis.
  • ​For example-  Chain procedure, PRECIS, COMPASS, POPSI, etc.​
• Post- coordinate Indexing-
  • The indexing system which has the ability to freely coordinate terms at the time of the search, providing an unlimited number of access points to a document belongs to the post-coordinate or coordinate indexing models.  
  • Post-coordinate indexing system was first conceived by Mortimer Taube in 1953 as a means of organizing the research reports acquired by the US Armed Services Technical Information Agency.
  • The most important feature of the post-coordinate indexing system is that "No sequence of terms or citation order is necessary".
  • For example-  Uniterm Indexing.​
• Chain Indexing-
  • S.R. Ranganathan developed it and defined it as a “procedure for deriving class index entry (i.e. subject index entry) which refers from a class to its class number in a more or less mechanical way.” 
  • Ranganathan first mentioned chain indexing in his book “Theory of Library Catalogue” in 1938.
  • It is an economical system of providing access to the terms without replicating the hierarchical structure of the classification in the alphabetical index.