Object state change and history management mechanism
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United States of America Patent
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Sep 18, 2001
Grant Date -
N/A
app pub date -
Nov 18, 1997
filing date -
Nov 18, 1997
priority date (Note) -
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Abstract
A system of managing changes in the states of interrelated objects provides for synchronization of change notifications transferred between source and target objects. In one embodiment, target objects subscribe to state changes in source objects and the change notifications are provided with unique temporal state identifiers such as a system time stamp or an assigned number to provide a temporal dimension and allow synchronization of the notifications at the target object. The state changes are actually in the form of methods applied to the source, and equivalent or identical methods are then applied to the target. A log of change notifications is provided, and each of the notifications are applied to the target object to synchronize it with relevant source objects to which it is dependent upon and to a particular selected point in time. The source objects comprise relational database objects, objects as in object-oriented systems and objects representing physical phenomena; and the target objects comprise views of data in the source objects.
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