Accession Number:

AD0423647

Title:

AUTOMATIC STRATIFICATION OF DESCRIPTORS,

Descriptive Note:

Corporate Author:

PENNSYLVANIA UNIV PHILADELPHIA MOORE SCHOOL OF ELECTRICAL ENGINEERING

Personal Author(s):

• Lefkovitz,David

Report Date:

1963-09-15

Pagination or Media Count:

1.0

Abstract:

A system is suggested that would make use of a digital computer in order to constantly revise the classification of the descriptors in terms of their actual usage within the document descriptions themselves. A two stage process is intended to produce a two level tree or reference catalog which in the first level presents aggregates of highly associated descriptors, while the second level presents respective aggreates of completely dissociated descriptors. The former is called an inclusive partitioning and the latter, an exclusive partitioning. The paper is principally concerned with the exclusive partitioning, but the last chapter is devoted to a discussion of the complete two stage process where a small selection of descriptors taken from the file of the Armed Services Technical Information Agency ASTIA is used to illustrate the construction of a sample index of Thesaurus. Author

Descriptors:

• *DOCUMENTS
• *CLASSIFICATION
• *INFORMATION RETRIEVAL
• DIGITAL COMPUTERS
• REPORTS
• DATA PROCESSING
• SCIENTIFIC RESEARCH
• ABSTRACTS
• SUBJECT INDEXING
• BIBLIOGRAPHIES
• MAGNETIC TAPE
• COMPUTER PROGRAMMING
• DATA STORAGE SYSTEMS

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE