A formal system for information retrieval from files
David K. Hsiao, Frank Harary · Communications of the ACM · 1970
A generalized file structure is provided by which the concepts of keyword, index, record, file, directory, file structure, directory decoding, and record retrieval are defined and from which some of the frequently used file structures such as inverted files, index-sequential files, and multilist files are derived. Two algorithms which retrieve records from the generalized file structure are presented.