Accession Number : AD0432198


Title :   AN EVALUATION OF LINKS AND ROLES USED IN INFORMATION RETRIEVAL,


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO


Personal Author(s) : Sinnett,Jefferson D


Report Date : Dec 1963


Pagination or Media Count : 312


Abstract : The use of links and roles in an information retrieval system is evaluated. Links and roles are techniques for modifying a basic coordinate indexing method. The purpose of the modification is to reduce the amount of irrelevant information retrieved without losing relevant information. Theory of retrieval is reviewed, mathematical models are discussed, retrieval is described in terms of basic concepts for algebra of sets, and a method of scoring effectiveness is presented. Roles were found inferior to links. Links showed reduction of irrelevant information by over 56% while incurring less than five% loss of relevant information. (Author)


Descriptors :   SUBJECT INDEXING , MATHEMATICAL MODELS , CLASSIFICATION , DATA PROCESSING , DIGITAL COMPUTERS


Distribution Statement : APPROVED FOR PUBLIC RELEASE