Data processing: database and file management or data structures – Database design – Data structure types
Patent
1996-07-11
1999-04-27
Black, Thomas G.
Data processing: database and file management or data structures
Database design
Data structure types
707 10, 707203, 707200, G06F 1730
Patent
active
058976361
ABSTRACT:
The present invention is a method and apparatus for providing a hierarchical networked database which supports multiple versions of the same underlying data. Structurally, the present invention is based on hierarchical tree-like structure known which includes one or more nodes connected by labeled branches. Any node in the tree may be reached by specifying a sequence of names which correspond to the branch labels between the root node and the desired node. The root node contains one or more name/attribute pairs which define an initial revision. Each descendent node inherits the revision defined by its ancestors and forms a new revision by including the changed name/attribute pairs which differ from the inherited revision. In this way, a particular revision is defined to be the changed name/attribute pairs contained in a node and the most recent instance of each unchanged name/attribute pair contained in the node's ancestors.
REFERENCES:
patent: 5535386 (1996-07-01), Wang
patent: 5603027 (1997-02-01), Ohkami
patent: 5664177 (1997-09-01), Lowry
Black Thomas G.
Robinson Greta L.
Tandem Corporation Incorporated
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