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CHAIN INDEXING

Presented by
Ezhilan
Introduction
•

Indexing has to specify exactly the
content of documents. This needs a
language by which the contents could be
described precisely (i.e. Indexing
Language).
• Indexing includes :
a) Conceptual Analysis, and
b) Representation (of the Contents)
Types of Indexing Techniques :
There are broadly two types of Indexing
Techniques or Indexing Methods. They are :
a) Pre-Coordinate Indexing, and
b) Post-Coordinate Indexing.
Pre-Coordinate Indexing Systems : It means the
key works are Co ordinated at the time of
indexing. ( PRECIS, POPSI and chain indexing)
Post-Coordinate Indexing Systems:
It means the key works are Co ordinated at the time
of searching. Ex. Uniterm indexing.
Chain Indexing
• Dr. S. R. Ranganathan developed a
method of indexing, called chain
procedure of subject indexing or simply
Chain Indexing. It is a method of deriving
alphabetical subject entries from the chain
of successive subdivisions of subjects
needed to be indexed leading from
general to specific level.
•
Definition
• According to Ranganathan,chain indexing
is a “procedure for deriving class index
entry (i.e. subject indexentry) which refers
from a class to its class number in a more
or less mechanical way.”
The basic steps in chain indexing are enumerated
below:

• a).Classify the subject of a document by
following a preferred classification
scheme.
• b) Represent the class number in the form
of a chain in which each link consists of
two parts: class number and its verbal
translation in standard term or phrase
used in the preferred classification
scheme.
Cont….
• c) Determine different kinds of links:
sought, unsought, false and missing links.
• d) Derive specific subject heading for the
specific subject entry from the last sought
link and moving upwards by taking the
necessary and sufficient sought links in a
reverse rendering or backward rendering
process.
Cont…
• e) Derive subject reference heading for
the subject reference from each of the
upper sought links.
• g) Prepare ‘see’ references for each
alternative and synonymous term used in
the specific as well as subject reference
headings.
Cont…
• h) Merge specific subject entries, subject
references (i.e. ‘See also’ references) and
‘See’ references and arrange them in
single alphabetical sequence.
Thank you.

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Chain indexing

  • 2. Introduction • Indexing has to specify exactly the content of documents. This needs a language by which the contents could be described precisely (i.e. Indexing Language). • Indexing includes : a) Conceptual Analysis, and b) Representation (of the Contents)
  • 3. Types of Indexing Techniques : There are broadly two types of Indexing Techniques or Indexing Methods. They are : a) Pre-Coordinate Indexing, and b) Post-Coordinate Indexing. Pre-Coordinate Indexing Systems : It means the key works are Co ordinated at the time of indexing. ( PRECIS, POPSI and chain indexing) Post-Coordinate Indexing Systems: It means the key works are Co ordinated at the time of searching. Ex. Uniterm indexing.
  • 4. Chain Indexing • Dr. S. R. Ranganathan developed a method of indexing, called chain procedure of subject indexing or simply Chain Indexing. It is a method of deriving alphabetical subject entries from the chain of successive subdivisions of subjects needed to be indexed leading from general to specific level. •
  • 5. Definition • According to Ranganathan,chain indexing is a “procedure for deriving class index entry (i.e. subject indexentry) which refers from a class to its class number in a more or less mechanical way.”
  • 6. The basic steps in chain indexing are enumerated below: • a).Classify the subject of a document by following a preferred classification scheme. • b) Represent the class number in the form of a chain in which each link consists of two parts: class number and its verbal translation in standard term or phrase used in the preferred classification scheme.
  • 7. Cont…. • c) Determine different kinds of links: sought, unsought, false and missing links. • d) Derive specific subject heading for the specific subject entry from the last sought link and moving upwards by taking the necessary and sufficient sought links in a reverse rendering or backward rendering process.
  • 8. Cont… • e) Derive subject reference heading for the subject reference from each of the upper sought links. • g) Prepare ‘see’ references for each alternative and synonymous term used in the specific as well as subject reference headings.
  • 9. Cont… • h) Merge specific subject entries, subject references (i.e. ‘See also’ references) and ‘See’ references and arrange them in single alphabetical sequence.

Editor's Notes

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