05347653 is referenced by 796 patents and cites 5 patents.

A method and apparatus for providing an historical perspective into a database of information objects through an efficient method and apparatus for versioning information objects stored in a database as well as an index representative of the information objects is disclosed. The latest versions of each one of the information objects and each one of the entries in the index are maintained in the database. Partial earlier versions of each one of the information objects and each one of the index entries are stored with the latest versions. The partial versions contain only sufficient information about the differences between the earlier versions and the later ones so that any earlier version may be reconstructed. Identification tags are employed as unique identifiers for each one of the plurality of information objects and for different versions of the information objects. Through the exploitation of the relative time ordering of generated identification tags, an efficient index representation and method for performing historical queries is provided.

Title
System for reconstructing prior versions of indexes using records indicating changes between successive versions of the indexes
Application Number
7/722696
Publication Number
5347653
Application Date
June 28, 1991
Publication Date
September 13, 1994
Inventor
Peter G Anick
Marlboro
MA, US
Rex A Flynn
Belmont
MA, US
Agent
Kenyon & Kenyon
Assignee
Digital Equipment Corporation
MA, US
IPC
G06F 15/40
View Original Source