Time-span representation and time chain of events in a...

Details Time-span representation and time chain of events in a... Time-span representation and time chain of events in a...

2006-08-21

2009-10-13

Robinson, Greta L (Department: 2169)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

07603396

ABSTRACT:
A method to produce a history of at least a portion of a database comprising: providing a data store that includes a record indicating a first event associated with first data that describes a subject matter, and indicating a first time interval during which the first data is effective with respect to the subject matter and indicating a second time interval during which the first data is current with respect to the database; and adjusting the data store upon an occurrence of a new event to, update a first record indicating the first event associated with first data and indicating an end time of the first time interval, and add a second new record indicating a second event associated with second data that describes the subject matter, and indicating a start of a new first time interval that is substantially continuous with an end time of the first time interval and during which the second data is effective with respect to the subject matter and indicating a start of a new second time interval during which the second data is current with respect to the database.

REFERENCES:
patent: 5548755 (1996-08-01), Leung et al.
patent: 5950210 (1999-09-01), Nelson
patent: 6421667 (2002-07-01), Codd et al.
International Search Report and Written Opinion mailed Mar. 25, 2008, for PCT Application No. PCT/US06/32658 filed Aug. 21, 2006, 8 pages.

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