Chain Indexing

Glossary of Library & Information Science

CHAIN INDEXING ➨ Chain Indexing or Chain Procedure is a mechanical method to derive subject index entries or subject headings from the class number of the document. It was developed by Dr. S.R. Ranganathan. He first mentioned this in his book “Theory of Library Catalogue” in 1938.


In Chain Procedure, the indexer or cataloguer is supposed to

Pre-Coordinate Indexing Systems

PRE-COORDINATE SUBJECT INDEXING SYSTEMS




Nowadays most of the documents deal with complex and compound subjects, each comprising a number of components or concepts. The coordination of these component terms is either done at the input stage or at the output stage. The index in which the coordination of components (index terms) is done at the input stage, is known as a pre-coordinate index