Match the Role Operators in PRECIS with the notations.

LIST - I (PRECIS Role Operators)		LIST - II (Notations)
A.	Action	I.	0
B.	Key System	II.	1
C.	Location	III.	2
D.	Performer	IV.	3

Choose the correct answer from the options given below:

The Correct answer is A - III, B - II, C - I, D - IV

Key Points

• PRECIS:
  • It stands for "Preserved Context Index System (PRECIS)" brought out in the early 1968s..
  • PRECIS is a system of subject indexing in which the initial string of terms is computer manipulated in such a way that each sought term in the string functions as the approach term while preserving the full context of the document.
  • It was developed by Derek Austin and applied to British National Bibliography (BNB) in 1971 as an alternative to the chain procedure for deriving subject index entries.
  • PRECIS developed its own code for the preparation of input strings by the human indexer and its subsequent processing by computer.
• Precis Role Operators-
  • Role operators consist of a set of alpha-numeric notations that specifies the grammatical role or the function of the indexed term and regulates the order of terms in the input string.
  • It also serves as the computer instruction for determining the format, typography, and punctuation associated with each index entry.
  • There are two kinds of role operators:
    • Primary operators - Primary operators control the sequence of terms in the input string and determine the format of index entries
    • Secondary operators-  secondary operators are always to be preceded by the primary operator to which it relates. 
    • The scheme of role operators is tabulated below-