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Method for Accessing Text Documents Stored As Variable-Length Records

IP.com Disclosure Number: IPCOM000063300D
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18

Publishing Venue

IBM

Related People

Authors:
Fichtner, LG Gibson, JH Kendrick, MR Levine, FE McKelley, CR Pierschalla, BR [+details]

Abstract

A method for accessing text documents stored as variable-length records on a diskette is described which allows an index file to be stored in a file that does not contain index structures which are recognized by the operating system's data management or input/output control system but minimizes the indices which must be stored on the media and also minimizes the number of I/O operations required when a record is to be located. Text processing programs require documents to be stored as variable-length records in a dataset. The records are accessed by a relative record number (RRN) and are grouped by a key. If an operating system such as Microsoft DOS is employed, the method to be described is advantageously used since DOS handles only fixed-length records, stored sequentially and does not employ a record index.