Variable length file header apparatus and system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Oct 31, 2007
filing date -
Feb 13, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
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.
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