Variable length file header apparatus and system

Ensuring that a user obtains a correct version of a file, wherein the file includes a file header section and a data section, is disclosed. Expiration information is inserted in the file header by a first application. The expiration information is extracted from the file header by a second applicati...

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Bibliographic Details
Main Authors TETUAN DAVID J, BLAIR WILLIAM R
Format Patent
LanguageEnglish
Published 26.06.2008
Subjects
BASIC ELECTRONIC CIRCUITRY
CALCULATING
CODE CONVERSION IN GENERAL
CODING
COMPUTING
COUNTING
DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES
DECODING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR
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Summary:Ensuring that a user obtains a correct version of a file, wherein the file includes a file header section and a data section, is disclosed. Expiration information is inserted in the file header by a first application. The expiration information is extracted from the file header by a second application. An expiration date for the file is determined from the extracted expiration information. The determined expiration date is compared with a comparison date, and use of the file is disallowed if the comparison determines that the file has expired.
Bibliography:Application Number: US20070982340