System for virtually converting data in a field between first an

Details System for virtually converting data in a field between first an System for virtually converting data in a field between first an

1997-04-09

1999-03-02

Black, Thomas G.

Data processing: database and file management or data structures

Database design

Data structure types

707 1, 707 6, 707101, 707102, 395701, G06F 1730

Patent

active

058784225

ABSTRACT:
The present invention provides a novel solution to the problem the quickly approaching turn of the century will have on software systems that were not designed to handle dates beyond the year 2000. The present invention is also applicable to any software application where it is desired to virtually change the formatting of any arbitrary item of data. The item of data can come from any type of data source such as data files or computer screen memory. The present invention operates by severing the link between the program conversion process and the data file conversion process. The present invention assumes control each time a converted program reads or writes a record of a data file that has not yet been converted. Converting records during I/O operations, enables a converted program to access an unconverted data file as if it were converted. The invention converts the data fields in a read record to a new format that is implementation specific before passing it on to the program. In the converted program, the data is defined in the new format which the program expects to see. Unconverted programs continue to access the actual unconverted data file. Thus, the present invention provides the converted program with a virtual converted view of an unconverted data file. The invention similarly converts data having the desired format to data having the old format before writing records to an unconverted data file.

REFERENCES:
patent: 5600836 (1997-02-01), Alter
patent: 5630118 (1997-05-01), Shaughnessy
patent: 5680622 (1997-10-01), Even
"A Scaelable, Automated Process for Year 2000 System Correction," John M. Hart et al., Peritus Software, Inc. Proceedings of the 1996 18th International Conference on Software Engineering, Berlin, Germany, Feb. 25, 1996, pp. 475-484, IEEE.
"Date Logic Generator: TransCentury Data Systems untangles Spaghetti Code", Pearkins, Enterprize Systems Journal, v11, N.5, p7(1), available at: http://dialog.krinfo.com, Dialog File 275. May 1996.
"DateServer 2000", Robert Chris, Enterprise Systems Journal, v9, N11, p10(1), DIALOG File 275 01806334. Nov. 1994.
"DOOMSDAY", Peter de Jagar, Computer World. Sep. 1993.
"DateServer 2000 -The Nutti-Century Solution", http://www.year2000.com. Jan. 1994.
"The Year 2000 and 2-digit Dates: A Guide for Planning and Implementation", IMB 4th ed. GC28-1251-03. Jan. 1995.

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