Browse Prior Art Database

ADLIB (At Desk LIBrary): ON-LINE LIBRARY CARD CATALOG UTILIZING WORD LEVEL INVERTED FILE STRUCTURE

IP.com Disclosure Number: IPCOM000035923D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 83K

Publishing Venue

IBM

Related People

Sagara, R: AUTHOR

Abstract

This technique provides a performance improvement over existing card- catalog search routines through its use of the word-level inverted file system. The scheme maximizes the use of disk space by reducing data redundancy and provides a greater degree of data availability. (Image Omitted)

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ADLIB (At Desk LIBrary): ON-LINE LIBRARY CARD CATALOG UTILIZING WORD LEVEL INVERTED FILE STRUCTURE

This technique provides a performance improvement over existing card- catalog search routines through its use of the word-level inverted file system. The scheme maximizes the use of disk space by reducing data redundancy and provides a greater degree of data availability.

(Image Omitted)

In a VM installation with off-site locations, where multi-CPUs and a shared DASD environment exist, system availability is increased and data redundancy is decreased. However, complications with system dependency occur with DBMSs, access methods, etc. To avoid complications of multi-CPU and off-site locations, ADLIB uses CMS sequential files. CMS sequential files are easily accessed from programs in the multi-CPU, shared DASD environment and easy to transport to off-site locations. Very efficient access to these CMS sequential files can be achieved from conventional programming languages.

ADLIB utilizes CMS sequential files in an inverted file structure to achieve high speed searching and also supports multi-user/multi- system environments. Because of its instant response time, regardless of the number of records searched and comprehensive search criteria, ADLIB virtually eliminates the need for a library visit to borrow a book.

ADLIB's inverted file system is unlike the conventional field value inversion which utilizes the entire field as a key value. It uses the more powerful word value inversion which utilizes each word in a field as a key value. The...